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Funding: This work was supported by a University of Kent 50th Anniversary Scholarship, and a Cotutelle de thèse grant from swissuniversities to J.V. Optimal foraging theory has guided much of the research on foraging behaviour in the past five decades, with the notion of optimality deeply embedded in most models today. However, assuming that all foragers strive to maximize a certain predefined currency, such as amount of food per unit time, restricts what can be learned about the factors influencing foraging decisions. Here we applied a different approach: the discrete-choice model, which does not assume an optimal strategy as the starting point, but instead examines foraging decisions directly, modelling interpatch movements as the consequence of a choice of destination from a limited set of options. We analysed a set of foraging decisions by both adult male and female chimpanzees, Pan troglodytes, from two habituated communities in the Budongo forest, Uganda, to investigate the influence of foraging variables including food patch characteristics and interpatch distance on patch choice, with a view to identifying the strategy underlying these decisions. Despite differences in habitat between communities, we found that foraging strategies were remarkably similar across both communities and sexes, with chimpanzees exhibiting a clear preference for closer and novel (not previously visited) food patches. Individuals of both communities frequently chose to forage on food patches providing young leaves, highlighting the importance of this food type in their diet. Contrary to expectation, patch size did not predict foraging decisions, except for adult males of one community that chose larger patches, while both sexes aimed to minimize travel distance between consecutive patches. This study provides the first direct evidence that chimpanzees consider travel distance and whether they have recently visited a patch when choosing between potential foraging sites and demonstrates that new insights can be gained (even in a well-studied system) from integrating several important variables describing feeding ecology into a coherent model of patch choice. Publisher PDF

Funding: This study was funded by the Max Planck Society and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program awarded to C.C. (grant agreement no. 679787). L.S. was supported by the Minerva Foundation, C.Y.A. and A.P. received funding from the LSB Leakey Foundation, C.Y.A. also received funding from Subvention Egalité (University of Neuchâtel, Switzerland) and Fonds des Donations (University of Neuchâtel, Switzerland). C.G. was supported by the Wenner-Gren Foundation. VM was supported by a grant of Deutsche Forschungsgemeinschaft (DFG) granted to R.M.W. (WI 2637/3-1). Core funding for the Taï Chimpanzee Project was provided by the Max Planck Society since 1997 and for Budongo Conservation Field Station by the Royal Zoological Society of Scotland since 2008. Open Access funding enabled and organized by Projekt DEAL. Mechanisms of inheritance remain poorly defined for many fitness-mediating traits, especially in long-lived animals with protracted development. Using 6,123 urinary samples from 170 wild chimpanzees, we examined the contributions of genetics, non-genetic maternal effects, and shared community effects on variation in cortisol levels, an established predictor of survival in long-lived primates. Despite evidence for consistent individual variation in cortisol levels across years, between-group effects were more influential and made an overwhelming contribution to variation in this trait. Focusing on within-group variation, non-genetic maternal effects accounted for 8% of the individual differences in average cortisol levels, significantly more than that attributable to genetic factors, which was indistinguishable from zero. These maternal effects are consistent with a primary role of a shared environment in shaping physiology. For chimpanzees, and perhaps other species with long life histories, community and maternal effects appear more relevant than genetic inheritance in shaping key physiological traits. Publisher PDF

What the pandemic has taught us about groups and democracy Publisher PDF

Funding: This research was supported by Economic and Social Research Council grant (ES/L003104/1), a Fellowship from the Australian Research Council (FL110100199), from funding received from the School of Management at the University of St Andrews. Drawing on the ‘engaged followership’ reinterpretation of Milgram’s work on obedience, four studies (three of which were pre-registered) examine the extent to which people’s willingness to follow an experimenter’s instructions is dependent on the perceived prototypicality of the science they are supposedly advancing. In Studies 1, 2 and 3, participants took part in a study that was described as advancing either ‘hard’ (prototypical) science (i.e., neuroscience) or ‘soft’ (non-prototypical) science (i.e., social science) before completing an online analogue of Milgram’s ‘Obedience to Authority’ paradigm. In Studies 1 and 2, participants in the neuroscience condition completed more trials than those in the social science condition. This effect was not replicated in Study 3, possibly because the timing of data collection (late 2020) coincided with an emphasis on social science’s importance in controlling COVID-19. Results of a final cross-sectional study (Study 4) indicated that participants who perceived the study as to be more prototypical of science found it more worthwhile, reported making a wider contribution by taking part, reported less dislike for the task, more happiness at having taken part, and more trust in the researchers, all of which indirectly predicted greater followership. Implications for the theoretical understanding of obedience to the toxic instructions of an authority are discussed. Publisher PDF

Authors thank the Royal Zoological Society Scotland for the core funding they provide to the Budongo Conservation Field Station. Associating with kin provides individual benefits but requires that these relationships be detectable. In humans, facial phenotype matching might help assess paternity; however, evidence for it is mixed. In chimpanzees, concealing visual cues of paternity may be beneficial due to their promiscuous mating system and the considerable risk of infanticide by males. On the other hand, detecting kin can also aid chimpanzees in avoiding inbreeding and in forming alliances that improve kin-mediated fitness. Although previous studies assessing relatedness based on facial resemblance in chimpanzees exist, they used images of captive populations in whom selection pressures and reproductive opportunities are controlled and only assessed maternity or paternity of adult offspring. In natural populations, the chances of infanticide are highest during early infancy, suggesting that young infants would benefit most from paternity concealment, whereas adults and subadults would benefit from the detection of all types of kin, including half-siblings. In our experiment, we conducted an online study with human participants, in which they had to assess the relatedness of chimpanzees based on facial similarity. To address previous methodological constraints, we used chimpanzee images across all ages, as well as maternal and paternal half-siblings. We found that kin status was detected above chance across all relatedness categories, with easier kin detection of father-offspring pairs, females, and older chimpanzees. Together, these findings support the existence of paternity confusion in infant chimpanzees and provide a possible mechanism for incest avoidance and kin-based social alliances in older individuals. Postprint

The study was funded by a St Leonard College Inter-University scholarship awarded to JC and KZ, the Swiss National Science Foundation awarded to KZ (310030_185324), and individual grants from Swiss universities and St Leonard Santander Mobility awarded to AS. Audience effects are key in studies of animal social cognition and are typically investigated during directed social interactions. Male chimpanzees regularly perform aggressive displays in the presence of others, often targeting a specific group member, and combine this agonistic behaviour with acoustic signals. Here, we were interested in whether the production and structure of pant hoots, a long-distance signal, were influenced by audience composition (i.e., presence and absence of specific individuals). We investigated pant hoots produced during displays by adult and sub-adult males of Budongo Forest, Uganda. We found that males overall called more often when their preferred social partners and females were absent from the party, as well as when more dominant males were present. We then separately analysed the four phases of pant hoots - introduction, build-up, climax, and let-down - and found that audience composition and social context could often explain the presence or absence of each phase. In addition, displays were often accompanied by drumming, especially by older males and when male audiences were small. Our study adds to the growing body of literature on audience effects and other social factors and shows their impact on the structure of a sophisticated vocal sequence, which enhances the communicative capacity in a species with limited vocal control. Publisher PDF

In the two-cup one-item task, subjects are shown a food item, which is then hidden inside one of two cups. Several species spontaneously select the baited cup above chance levels if shown that the other cup is empty. Although this response may indicate inference by exclusion (if not A, then B), another possibility is that subjects simply avoid choosing the empty cup, not because they expect the food to be in the other cup but because they have seen that cup to be empty. I tested whether this hypothesis explains great apes' responses in a three-cup one-item task. Subjects saw three opaque cups on a platform, with two of them located behind a barrier during baiting. After baiting one of the cups behind the barrier, I revealed the identity of the empty cup that had been located behind the barrier (Experiment 1) or revealed the contents of the center cup (baited in half of the trials), but always removed it before the subjects' choice (Experiment 2). In Experiment 1, subjects preferentially selected the baited cup even though one of the other two cups had not been shown to be empty. In Experiment 2, subjects' preference for the cup that had been located behind the barrier during baiting was modulated by the contents of the removed cup. These results suggest that expectations about the food's location, not just the sight of the empty cup, as postulated by the "avoid the empty cup" hypothesis, determine apes' responses in the three-cup one-item task. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

This work was supported by a PhD studentship awarded to the first author by Canterbury Christ Church University. This paper presents an analysis of identity leadership (Haslam et al., The new psychology of leadership: Identity, influence and power, Routledge, 2020) in the 1988 ?Candlelight Demonstration? in Bratislava which was a precursor to the 1989 Velvet Revolution. The analysis is based on interviews with the five remaining leaders of the demonstration and addresses three core issues. First, how leaders use performative means (identity impresarioship) as well as limited rhetorical means (identity entrepreneurship) to assemble protestors and create a sense of shared identity amongst them. Second, how these strategies of mobilization are linked to the highly repressive context in which the demonstration took place. Third, we analyse the extent to which these strategies are rooted in a psychological understanding of the processes of mobilization. We conclude by addressing the implications for our general understanding of leadership and the mobilization of collective action and the need for more research into these processes under conditions of repression. Publisher PDF

Funding: UK Research and Innovation. Grant Number: ES/V005383/1. Vaccines can play a crucial role in reducing the negative outcomes of pandemics. In this paper we explore how vaccine perceptions and uptake willingness can be affected by vaccine-related information, the vaccine’s country of origin, and national identity. Study 1 (N = 800) showed that a vaccine manufactured by China was perceived more negatively compared to vaccines from the UK, Germany, and Chile. Providing vaccine effectiveness information (83%) increased preference for waiting for an alternative vaccine and reduced perceived effectiveness of a vaccine from China. Brexit supporters perceived vaccines as less safe in general, and particularly thought of a vaccine from China as less competent, effective, and trustworthy, and were less prepared to have it. Study 2 (N = 601) largely replicated findings of Study 1 regarding the effects of a vaccine’s country of origin. Moreover, participants who reported a higher sense of British superiority reported more negative attitudes towards a vaccine from China. However, apart from the aforementioned main effects of Study 2, our attempt to manipulate British identity vis a vis a Global identity in order to examine particular national-identity related outcomes was not successful. Overall, vaccine characteristics can interact with various social psychological factors, potentially affecting people’s perceptions and willingness to uptake particular measures to support personal and public health. Publisher PDF

Individuals with a history of depression have an increased risk for future episodes. This risk has been linked with impaired features of autobiographical memory retrieval that remain when depressive symptoms abate, including memory specificity, remoteness, valence, and vantage perspective. Rumination has been shown to influence these impairments and can be reduced via compassion training. We therefore investigated the effects of a self-compassion meditation on autobiographical memory retrieval in remitted depression. Baseline data were collected (n = 50) using an extended version of the Autobiographical Memory Test where participants with remitted depression retrieved specific memories from a remote time period (10 cues) and from any time period (10 cues). Valence and vantage perspective were rated. Participants were then randomly allocated to a self-compassion meditation or (control) colouring intervention group. Baseline measures were reassessed after four weeks of the intervention. Results revealed increased retrieval of specific memories in the self-compassion group in comparison to the colouring group, and an increase in positive and field memories across groups while no remoteness changes were observed. This self-compassion meditation demonstrated initial promise as an intervention to influence features of autobiographical memory retrieval in remitted depression. Improvements were shown in specificity, valence, and vantage perspective. Addressing these features with this type of intervention might reduce a cognitive vulnerability to depression and should be investigated in future studies. Publisher PDF

The causes of sex differences in human behaviour are contested, with ‘evolutionary’ and ‘social’ explanations often being pitted against each other in the literature. Recent work showing positive correlations between indices of gender equality and the size of sex differences in behaviour has been argued to show support for ‘evolutionary’ over ‘social’ approaches. This argument, however, neglects the potential for social learning to generate arbitrary gender segregation. In the current paper we simulate, using agent-based models, a population where agents exist as one of two ‘types’ and can use social information about which types of agents are performing which ‘roles’ within their environment. We find that agents self-segregate into different roles even where real differences in performance do not exist, if there is a common belief (modelled as priors) that group differences may exist in ‘innate’ competence. Facilitating role changes such that agents should move without cost to the predicted highest-rewards for their skills (i.e. fluidity of the labour market) reduced segregation, while forcing extended exploration of different roles eradicated gender segregation. These models are interpreted in terms of bio-cultural evolution, and the impact of social learning on the expression of gender roles. Publisher PDF

redacted "The work presented in this thesis was funded by the School of Psychology and Neuroscience at the University of St Andrews and by the St Andrews Restarting Research Funding Scheme (SARRF). Additionally, I received funding from the Santander Postgraduate Research Funding Scheme."--Funding Acknowledgement

When facing uncertainty, humans often build mental models of alternative outcomes. Considering diverging scenarios allows agents to respond adaptively to different actual worlds by developing contingency plans (covering one's bases). In a pre-registered experiment, we tested whether chimpanzees (Pan troglodytes) prepare for two mutually exclusive possibilities. Chimpanzees could access two pieces of food, but only if they successfully protected them from a human competitor. In one condition, chimpanzees could be certain about which piece of food the human experimenter would attempt to steal. In a second condition, either one of the food rewards was a potential target of the competitor. We found that chimpanzees were significantly more likely to protect both pieces of food in the second relative to the first condition, raising the possibility that chimpanzees represent and prepare effectively for different possible worlds. Postprint

In this article, we integrate cultural evolutionary theory with empirical research from developmental psychology, cultural anthropology, and primatology to explore the role of peer learning in the development of complex instrumental skills and behavioral norms. We show that instrumental imitation, contingent teaching, generative collaboration, and selective copying contribute to domain-specific transmission of knowledge between peers. Stages of development and characteristics inherent to the learner and model influence how and when children learn from each other. Peer learning is persistent across societies despite cultural beliefs that favor adult-child transmission in some settings. Comparative research hints at the possibility that children's greater motivation to interact with and learn from each other may set humans apart from other primates. We conclude by outlining avenues for future research, including how individual characteristics and developmental changes in social networks, motivation, and cognition may contribute to cultural evolution. Publisher PDF

Abstract Primates understand the meaning of their own and other species’ alarm calls, but little is known about how they acquire such knowledge. Here, we combined direct behavioural observations with playback experiments to investigate two key processes underlying vocal development: comprehension and usage. Especifically, we studied the development of con- and heterospecific alarm call recognition in free-ranging sooty mangabeys, Cercocebus atys, across three age groups: young juveniles (1–2y), old juveniles (3–4y) and adults (> 5y). We observed that, during natural predator encounters, juveniles alarm called to a significantly wider range of species than adults, with evidence of refinement during the first four years of life. In the experiments, we exposed subjects to leopard, eagle and snake alarm calls given by other group members or sympatric Diana monkeys. We found that young juveniles’ locomotor and vocal responses were least appropriate and that they engaged in more social referencing (look at adults when hearing an alarm call) than older individuals, suggesting that vocal competence is obtained via social learning. In conclusion, our results suggest that alarm call comprehension is socially learned during the juvenile stage, with comprehension preceding appropriate usage but no difference between learning their own or other species’ alarm calls. Significance statement Under natural conditions, animals do not just interact with members of their own species, but usually operate in a network of associated species. However, ontogenetic research on primate communication frequently ignores this significant element. We studied the development of con- and heterospecific alarm call recognition in wild sooty mangabeys. We found that communicative competence was acquired during the juvenile stages, with alarm call comprehension learning preceding appropriate vocal usage and with no clear difference in learning of con- and heterospecific signals. We also found that, during early stages of life, social referencing, a proactive form of social learning, was key in the acquisition of competent alarm call behaviour. Our results show that primates equally learn to interpret alarm calls from their own and other species during their early stages of life and that this learning process is refined as the animals mature.

Funding: This work was supported by a Royal Society Research Grant to SP (RG150108), Collaborative Research Grant funding by the Halle Institute for Global Research at Emory University and University of St Andrews to SP and AP, a Wellcome Trust Seed Award to SP (105621/Z/14/Z), a Emory Computational Neuroscience Fellowship stipend to OM, support from Emory University’s Graduate Division of Biological and Biomedical Sciences and from the George W. Woodruff Fellowship for LP, and VPASA Seed Grant funding at Georgia Gwinnett College awarded to CG. Sodium potassium ATPases (Na/K pumps) mediate long-lasting, dynamic cellular memories that can last tens of seconds. The mechanisms controlling the dynamics of this type of cellular memory are not well understood and can be counterintuitive. Here, we use computational modeling to examine how Na/K pumps and the ion concentration dynamics they influence shape cellular excitability. In a Drosophila larval motor neuron model, we incorporate a Na/K pump, a dynamic intracellular Na+ concentration, and a dynamic Na+ reversal potential. We probe neuronal excitability with a variety of stimuli, including step currents, ramp currents, and zap currents, then monitor the sub- and suprathreshold voltage responses on a range of time scales. We find that the interactions of a Na+-dependent pump current with a dynamic Na+ concentration and reversal potential endow the neuron with rich response properties that are absent when the role of the pump is reduced to the maintenance of constant ion concentration gradients. In particular, these dynamic pump-Na+ interactions contribute to spike rate adaptation and result in long-lasting excitability changes after spiking and even after sub-threshold voltage fluctuations on multiple time scales. We further show that modulation of pump properties can profoundly alter a neuron’s spontaneous activity and response to stimuli by providing a mechanism for bursting oscillations. Our work has implications for experimental studies and computational modeling of the role of Na/K pumps in neuronal activity, information processing in neural circuits, and the neural control of animal behavior. Publisher PDF

IntroductionThe ultimate deficit in amyotrophic lateral sclerosis (ALS) is neuromuscular junction (NMJ) loss, producing permanent paralysis, ultimately in respiratory muscles. However, understanding the functional and structural deficits at NMJs prior to this loss is crucial for therapeutic strategy design. Should early interventions focus on reversing denervation, or supporting largely intact NMJs that are functionally impaired? We therefore determined when functional and structural deficits appeared in diaphragmatic NMJs relative to the onset of hindlimb tremor (the first overt motor symptoms) in vivo in the SOD1-G93A mouse model of ALS.Materials and methodsWe employed electrophysiological recording of NMJ postsynaptic potentials for spontaneous and nerve stimulation-evoked responses. This was correlated with fluorescent imaging microscopy of the postsynaptic acetylcholine receptor (AChR) distribution throughout the postnatal developmental timecourse from 2 weeks to early symptomatic ages.ResultsSignificant reduction in the amplitudes of spontaneous miniature endplate potentials (mEPPs) and evoked EPPs emerged only at early symptomatic ages (in our colony, 18-22 weeks). Reductions in mEPP frequency, number of vesicles per EPP, and EPP rise time were seen earlier, at 16weeks, but this reversed by early symptomatic ages. However, the earliest and most striking impairment was an inability to maintain EPP amplitude during a 20 Hz stimulus train, which appeared 6 weeks before overt in vivo motor symptoms. Despite this, fluorescent α-bungarotoxin labelling revealed no systematic, progressive changes in 11 comprehensive NMJ morphological parameters (area, shape, compactness, number of acetylcholine receptor, AChR, regions, etc.) with disease progression. Rather, while NMJs were largely normally-shaped, from 16 weeks there was a progressive and substantial disruption in AChR concentration and distribution within the NMJ footprint.DiscussionThus, NMJ functional deficits appear at least 6 weeks before motor symptoms in vivo, while structural deficits occur 4 weeks later, and predominantly within NMJs. These data suggest initial therapies focused on rectifying suboptimal NMJ function could produce effective relief of symptoms of weakness.

This project received funding from the European Union's 8th Framework Programme, Horizon 2020 (grant agreement number: 802719) and the St Andrews Restarting Research Funding Scheme (2020). 1. Studying animal behaviour allows us to understand how different species and individuals navigate their physical and social worlds. Video coding of behaviour is considered a gold standard: allowing researchers to extract rich nuanced behavioural datasets, validate their reliability, and for research to be replicated. However, in practice, videos are only useful if data can be efficiently extracted. Manually locating relevant footage in 10,000 s of hours is extremely time-consuming, as is the manual coding of animal behaviour, which requires extensive training to achieve reliability. 2. Machine learning approaches are used to automate the recognition of patterns within data, considerably reducing the time taken to extract data and improving reliability. However, tracking visual information to recognise nuanced behaviour is a challenging problem and, to date, the tracking and pose-estimation tools used to detect behaviour are typically applied where the visual environment is highly controlled. 3. Animal behaviour researchers are interested in applying these tools to the study of wild animals, but it is not clear to what extent doing so is currently possible, or which tools are most suited to particular problems. To address this gap in knowledge, we describe the new tools available in this rapidly evolving landscape, suggest guidance for tool selection, provide a worked demonstration of the use of machine learning to track movement in video data of wild apes, and make our base models available for use. 4. We use a pose-estimation tool, DeepLabCut, to demonstrate successful training of two pilot models of an extremely challenging pose estimate and tracking problem: multi-animal wild forest-living chimpanzees and bonobos across behavioural contexts from hand-held video footage. 5. With DeepWild we show that, without requiring specific expertise in machine learning, pose estimation and movement tracking of free-living wild primates in visually complex environments is an attainable goal for behavioural researchers. Publisher PDF

Individuals who experience the imposter phenomenon (IP) have feelings of self-doubt and are concerned that they will be exposed as frauds. Previous research has indicated that IP is associated with anxiety, depression and low self-esteem, and university students are thought to be particularly susceptible to IP. This study investigated the relationship between IP and self-efficacy, maladaptive perfectionism and happiness in university students, and examined whether these variables differ between females and males. The study also examined whether IP was associated with belonging and perceived levels of academic competition. Participants (N = 261) completed the Clance Imposter Phenomenon Scale (CIPS), New General Self-Efficacy (NGSE), Big Three Perfectionism Scale – Short Form (BTPS-SF), Oxford Happiness Questionnaire (OHQ), plus measures of belonging and perceived competition. As predicted, CIPS scores correlated negatively with NGSE and OHQ and positively with BTPS-SF in both sexes. Females scored higher, on average, than males on CIPS and BTPS-SF, and the gender difference in CIPS remained after indirect effects of perfectionism were removed. Neither belonging nor competition correlated with CIPS scores. The negative relationship between perfectionism and happiness was fully mediated by imposterism, which suggests that designing interventions that reduce IP could positively enhance student wellbeing.

Funding: This work was supported by the Swiss National Science Foundation (PP00P3_163850 & PP00P3_198912) to S.W.T. and the NCCR Evolving Language (SNSF Agreement #51NF40_180888). Through syntax, i.e., the combination of words into larger phrases, language can express a limitless number of messages. Data in great apes, our closest-living relatives, are central to the reconstruction of syntax’s phylogenetic origins, yet are currently lacking. Here, we provide evidence for syntactic-like structuring in chimpanzee communication. Chimpanzees produce “alarm-huus” when surprised and “waa-barks” when potentially recruiting conspecifics during aggression or hunting. Anecdotal data suggested chimpanzees combine these calls specifically when encountering snakes. Using snake presentations, we confirm call combinations are produced when individuals encounter snakes and find that more individuals join the caller after hearing the combination. To test the meaning-bearing nature of the call combination, we use playbacks of artificially-constructed call combinations and both independent calls. Chimpanzees react most strongly to call combinations, showing longer looking responses, compared with both independent calls. We propose the “alarm-huu + waa-bark” represents a compositional syntactic-like structure, where the meaning of the call combination is derived from the meaning of its parts. Our work suggests that compositional structures may not have evolved de novo in the human lineage, but that the cognitive building-blocks facilitating syntax may have been present in our last common ancestor with chimpanzees. Publisher PDF

This work was supported by the UK Research and Innovation/Economic and Social Research Council (grant reference number ES/V005383/1). Public adoption of preventative behaviors to reduce the transmission of COVID-19 is crucial to managing the pandemic, and so it is vital to determine what factors influence the uptake of those behaviors. Previous studies have identified COVID-19 risk perceptions as a key factor, but this work has typically been limited both in assuming that risk means risk to the personal self, and in being reliant on self-reported data. Drawing on the social identity approach, we conducted two online studies in which we investigated the effects of two different types of risk on preventative measure taking: risk to the personal self and risk to the collective self (i.e., members of a group with which one identifies). Both studies involved behavioral measures using innovative interactive tasks. In Study 1 (n = 199; data collected 27 May 2021), we investigated the effects of (inter)personal and collective risk on physical distancing. In Study 2 (n = 553; data collected 20 September 2021), we investigated the effects of (inter)personal and collective risk on the speed at which tests are booked as COVID-19 symptoms develop. In both studies, we find that perceptions of collective risk, but not perceptions of (inter)personal risk, influence the extent to which preventative measures are adopted. We discuss the implications both conceptually (as they relate to both the conceptualization of risk and social identity processes) and also practically (in terms of the implications for public health communications). Publisher PDF

Funding: This work was supported by a Laidlaw Scholarship to YB and a St Andrews Restarting Research Funding Scheme (SARRFS) to IJ. Detriments to performance under pressure are common in many performance settings, from public speaking to skilled sports or music performances. In the last few decades, sports scientists have suggested that the quality and accuracy of movements can depend on what the performer attends to while executing the action, with an external focus of attention directed at the effects of the movement on the environment resulting in better performance than an internal focus, where attention is directed at the performer’s own body movements. Here we investigated the effects of attention focus instruction on the accuracy of piano performance. Amateur pianists were asked to practice a set piano piece for 7 days and then perform it to the experimenter under different performance instructions (no instruction, internal focus, external focus). An external focus of attention resulted in more accurate performance compared to an internal focus instruction, as evaluated by the difference in the number of note pitch errors and note corrections between the two conditions. Importantly, the advantage of an external over internal focus did not depend on pianistic expertise in our sample. Our research supports the idea that an external attention focus can improve music performance and should be considered in music teaching practice. Publisher PDF

Funding was received for this research from the University of St Andrews and the Kirsten Scott Memorial Trust. The Budongo Conservation Field Station is supported by the Royal Zoological Society of Scotland. CH is supported by funding from the European Union’s 8th Framework Programme, Horizon 2020 (grant agreement no. 802719). Access to resources shapes species’ physiology and behaviour. Water is not typically considered a limiting resource for rainforest-living chimpanzees; however, several savannah and savannah-woodland communities show behavioural adaptations to limited water. Here, we provide a first report of habitual well-digging in a rainforest-living group of East African chimpanzees (Pan troglodytes schweinfurthii) and suggest that it may have been imported into the community’s behavioural repertoire by an immigrant female. We describe the presence and frequency of well-digging and related behaviour, and suggest that its subsequent spread in the group may have involved some degree of social learning. We highlight that subsurface water is a concealed resource, and that the limited spread of well-digging in the group may highlight the cognitive, rather than physical, challenges it presents in a rainforest environment. Publisher PDF

The study was funded by the National Swiss Foundation grant number: SNF 31003A_166458 and the NCCR Evolving Language, Swiss National Science Foundation Agreement #51NF40_180888. Social learning is beneficial in almost every domain of a social animal's life, but it is particularly important in the context of predation and foraging. In both contexts, social animals tend to produce acoustically distinct vocalizations, alarms, and food calls, which have remained somewhat of an evolutionary conundrum as they appear to be costly for the signaller. Here, we investigated the hypothesis that food calls function to direct others toward novel food items, using a playback experiment on a group of chimpanzees. We showed chimpanzees novel (plausibly edible) items while simultaneously playing either conspecific food calls or acoustically similar greeting calls as a control. We found that individuals responded by staying longer near items previously associated with food calls even in the absence of these vocalizations, and peered more at these items compared with the control items, provided no conspecifics were nearby. We also found that once chimpanzees had access to both item types, they interacted more with the one previously associated with food calls than the control items. However, we found no evidence of social learning per se. Given these effects, we propose that food calls may gate and thus facilitate social learning by directing listeners' attention to new feeding opportunities, which if integrated with additional cues could ultimately lead to new food preferences within social groups. Publisher PDF

The project leading to these results has received funding from “La Caixa” Foundation (ID 100010434) under agreement LCF/BQ/ES17/11600021 awarded to Ana Clemente, from “La Caixa” Foundation (ID 100010434) under agreement LCF/BQ/DE17/11600022 awarded to Manel Vila-Vidal, and Olivier Penacchio was partially funded by a Leverhulme grant (RPG-2019-96) to Professor Julie M. Harris and a Research Incentive Grant from the Carnegie Trust (RIG009298). Preference for curvature, the curvature effect, seems to transcend cultures, species, and stimulus kinds. However, its nature and psychological mechanisms remain obscure because studies often overlook the complexity of contour characterization and disregard personal and contextual factors. To investigate the curvature effect, we propose a continuous and multidimensional manipulation and contrasting experimental conditions examined at the group and individual levels that unveil a complex picture, not reducible to monotonous relationships: Perceptual and hedonic evaluations relied on multiple geometric features defining contour and shape. These features were specifically weighted to characterize each construct, depending on the individual and contingent on whether evaluating perceptually or hedonically. Crucially, the curvature effect was not robust to preference with respect to the median and continuous manipulations of contour for varying shapes. As curved contours are more easily perceived and processed than polygons, we hypothesized that perceived contour might explain liking for a figure beyond the effect of geometric features, finding that this association was subordinated to shape categorizations. Finally, domain-specific, personality, and cognitive-preference traits moderated how people used each geometric feature in their perceptual and hedonic evaluations.We conclude that research on perception and appreciation of contour and shape should factor in their complexity and defining features. Additionally, embracing individual sensitivities opens potential avenues to advance the understanding of psychological phenomena. In summary, our approach unpacks a complex picture of contour preference that prompts critical reflections on past research and advice for future research, and it is applicable to other psychological constructs. Postprint

In the wild, coordinated behaviour across group members is essential for maintaining spatial coherence, with potential implications for individual fitness. Such coordination often leads to behavioural synchrony (performing the same behaviour at the same time). Tufted capuchins ( Sapajus apella ) and squirrel monkeys ( Saimiri sciureus ) are known to form mixed-species groups (MSGs), travelling and foraging together. Yet, it is unclear if it is necessary to synchronize behaviours in captivity when ecological pressures are minimal compared to the wild. We investigated the extent to which two MSGs of capuchins ( N = 35) and squirrel monkeys ( N = 26) synchronized their behaviour with conspecifics and heterospecifics at the Living Links to Human Evolution Research Centre, RZSS, Edinburgh Zoo, UK. Group activities were sampled by instantaneous scans of all visible individuals. Scans ( n = 180) were analysed for five most frequently observed behaviours. Intraspecies synchrony was calculated using Simpson's Diversity Index, and interspecies synchrony was measured using cross-correlations. Intraspecific synchrony was significantly greater compared to randomly aggregated data, while cross-correlations indicated interspecific asynchrony. Living together did not lead to interspecific synchrony as may be expected given the coordination and behaviour described in the wild, and shared husbandry in captivity. Overall, our findings highlight differences in the behavioural structure of single- versus MSGs. This article is part of the theme issue ‘Mixed-species groups and aggregations: shaping ecological and behavioural patterns and processes’.

Objectives This multi-arm randomized controlled online trial explored the effects of two key mindfulness characteristics (dose and type) over 2 weeks on mental well-being, along with psychological distress and dispositional mindfulness, in a healthy community sample. Method Participants were randomly assigned to one of four mindfulness interventions (~ 10 min or ~ 30 min of sitting or movement meditation) to practice daily for 2 weeks; 161 participants fully completed the study and were included in the final sample. We also explored self-reported adherence through how often participants practiced, along with dropout rate via how many participants fully completed the study. Results Well-being and mindfulness scores increased—and distress scores decreased—within all four conditions. However, most importantly, there were no significant differences between the conditions as a function of meditation dose or type. There were also no differences between the conditions on how regularly the meditations were practiced irrespective of type or dose. Additionally, there was no difference on dropout rate regarding meditation dose. However, meditation type had an effect, with a significantly higher dropout rate for participants allocated to a movement meditation irrespective of the dose. Conclusions Brief mindfulness meditation may offer some benefit to well-being regardless of the meditation type and dose but, fundamentally, no differences in effects were detected between short/long sitting meditations and short/long movement meditations. Moreover, the results indicate that movement meditations may possibly be harder to adhere to, potentially informing the tailoring of mindfulness-based self-help programs. Limitations and future directions are also discussed. Preregistration This study was retrospectively registered with the Australian New Zealand Clinical Trials Registry (ACTRN12619000422123).

Funding: Open access funding provided by University of Lausanne. Funding was provided by FP7 Ideas: European Research Council, 283871, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, 310030_143359, PP00P3_170624, Branco Weiss Fellowship-Society in Science. Primate alarm calls are mainly hardwired but individuals need to adapt their calling behaviours according to the situation. Such learning necessitates recognising locally relevant dangers and may take place via their own experience or by observing others. To investigate monkeys alarm calling behaviour, we carried out a field experiment in which we exposed juvenile vervet monkeys to unfamiliar raptor models in the presence of audiences that differed in experience and reliability. We used audience age as a proxy for experience and relatedness as a proxy for reliability, while quantifying audience reactions to the models. We found a negative correlation between alarm call production and callers’ age. Adults never alarm called, compared to juveniles. We found no overall effect of audience composition and size, with juveniles calling more when with siblings than mothers or unrelated individuals. Finally, concerning audience reactions to the models, we observed juveniles remained silent with vigilant mothers and only alarm called with ignoring mothers, whereas we observed the opposite for siblings: juveniles remained silent with ignoring siblings and called with vigilant siblings. Despite the small sample size, juvenile vervet monkeys, confronted with unfamiliar and potentially dangerous raptors, seem to rely on others to decide whether to alarm call, demonstrating that the choice of the model may play an important key role in the ontogeny of primate alarm call behaviour. Publisher PDF

Funding: HCA was supported by a studentship funded by Plymouth University School of Marine Science and Engineering. The breeding season field work was supported by Natural Environment Research Council (NERC) National Capability Funding to SMRU (NE/R015007/1). The field work in Blakeney and Donna Nook was supported by funding to DJFR from UK Department of Business, Energy and Industrial Strategy (formerly DECC) as part of their Offshore Energy Strategic Environmental Assessment programme (OESEA-14–47) and was conducted with permission from Natural England and facilitated by National Trust and Lincolnshire Wildlife Trust. Life-history-oxidative stress theory predicts that elevated energy costs during reproduction reduce allocation to defences and increase cellular stress, with fitness consequences, particularly when resources are limited. As capital breeders, grey seals are a natural system in which to test this theory. We investigated oxidative damage (malondialdehyde (MDA) concentration) and cellular defences (relative mRNA abundance of heat shock proteins (Hsps) and redox enzymes (REs)) in blubber of wild female grey seals during the lactation fast (n = 17) and summer foraging (n = 13). Transcript abundance of Hsc70 increased, and Nox4, a pro-oxidant enzyme, decreased throughout lactation. Foraging females had higher mRNA abundance of some Hsps and lower RE transcript abundance and MDA concentrations, suggesting they experienced lower oxidative stress than lactating mothers, which diverted resources into pup rearing at the expense of blubber tissue damage. Lactation duration and maternal mass loss rate were both positively related to pup weaning mass. Pups whose mothers had higher blubber glutathione-S-transferase (GST) expression at early lactation gained mass more slowly. Higher glutathione peroxidase (GPx) and lower catalase (CAT) were associated with longer lactation but reduced maternal transfer efficiency and lower pup weaning mass. Cellular stress, and the ability to mount effective cellular defences, could proscribe lactation strategy in grey seal mothers and thus affect pup survival probability. These data support the life-history-oxidative stress hypothesis in a capital breeding mammal and suggest lactation is a period of heightened vulnerability to environmental factors that exacerbate cellular stress. Fitness consequences of stress may thus be accentuated during periods of rapid environmental change. Publisher PDF

Funding: Open access funding provided by University of Neuchâtel. This study was primarily funded by the Swiss National Science Foundation through grants (31003A_166458 and 310030_185324) awarded to KZ and (PP00P3_170624) to EvdW as well as the Branco Weiss Fellowship—Society in Science. AD is additionally supported by the Swiss National Science Foundation through grant (P2NEP3_200190). The alarm calls of nonhuman primates are occasionally cited as functionally equivalent to lexical word meaning in human language. Recently, however, it has become increasingly unlikely that one-to-one relations between alarm call structures and predator categories are the default, mainly because many call types are produced in multiple contexts, requiring more complex notions of meaning. For example, male vervet monkeys produce the same alarm calls during encounters with terrestrial predators and neighbouring groups, suggesting that recipients require additional information to attribute meaning to the calls. We empirically tested the hypothesis that vervet monkeys take contextual information into account when responding to each other's alarm calls. In playback experiments, we exposed subjects to recordings of male alarm barks during actual intergroup encounters (predator unlikely) or when there was no intergroup encounter (predator likely). Subjects responded more strongly in the no intergroup encounter situations, typically associated with discovering a hiding predator, measured in terms of startle responses, vigilance behaviour and gazing towards the presumed caller. We discuss the significance of using contextual information for meaning attribution in nonhuman primate communication. Publisher PDF

Funding: This research received funding from the European Union’s 8th Framework Programme, Horizon 2020, under grant agreement no 802719. Current methodologies present significant hurdles to understanding patterns in the gestural communication of individuals, populations, and species. To address this issue, we present a bottom-up data collection framework for the study of gesture: GesturalOrigins. By “bottom-up”, we mean that we minimise a priori structural choices, allowing researchers to define larger concepts (such as ‘gesture types’, ‘response latencies’, or ‘gesture sequences’) flexibly once coding is complete. Data can easily be re-organised to provide replication of, and comparison with, a wide range of datasets in published and planned analyses. We present packages, templates, and instructions for the complete data collection and coding process. We illustrate the flexibility that our methodological tool offers with worked examples of (great ape) gestural communication, demonstrating differences in the duration of action phases across distinct gesture action types and showing how species variation in the latency to respond to gestural requests may be revealed or masked by methodological choices. While GesturalOrigins is built from an ape-centred perspective, the basic framework can be adapted across a range of species and potentially to other communication systems. By making our gesture coding methods transparent and open access, we hope to enable a more direct comparison of findings across research groups, improve collaborations, and advance the field to tackle some of the long-standing questions in comparative gesture research. Publisher PDF

We present an exploratory study on iridescence that revealed systematic differences in the perceptual clustering of glossy and iridescent samples that was driven by instructions to focus on either the material or the color properties of the samples. Participants’ similarity ratings of pairs of video stimuli, showing the samples from multiple views, were analyzed using multidimensional scaling (MDS), and differences between the MDS solutions for the two tasks were consistent with flexible weighting of information from different views of the samples. These findings point to ecological implications for how viewers perceive and interact with the color-changing properties of iridescent objects. Publisher PDF

Funding: EF’s fieldwork was supported by The Clarendon Fund at the University of Oxford, The British Institute of Eastern Africa (BIEA) and Keble College at the University of Oxford. While cases of interspecies grooming have been reported in primates, no comprehensive cross-site review has been published about this behavior in great apes. Only a few recorded observations of interspecies grooming events between chimpanzees and other primate species have been reported in the wild, all of which have thus far been in Uganda. Here, we review all interspecies grooming events recorded for the Sonso community chimpanzees in Budongo Forest Reserve, Uganda, adding five new observations to the single, previously reported event from this community. A new case of interspecies play involving three juvenile male chimpanzees and a red-tailed monkey is also detailed. All events took place between 1993 and 2021. In all of the six interspecific grooming events from Budongo, the ‘groomer’ was a female chimpanzee between the ages of 4–6 years, and the ‘recipient’ was a member of the genus Cercopithecus. In five of these events, chimpanzee groomers played with the tail of their interspecific grooming partners, and except for one case, initiated the interaction. In three cases, chimpanzee groomers smelled their fingers after touching distinct parts of the receiver’s body. While a single function of chimpanzee interspecies grooming remains difficult to determine from these results, our review outlines and assesses some hypotheses for the general function of this behavior, as well as some of the costs and benefits for both the chimpanzee groomers and their sympatric interspecific receivers. As allogrooming is a universal behavior in chimpanzees, investigating the ultimate and proximate drivers of chimpanzee interspecies grooming may reveal further functions of allogrooming in our closest living relatives, and help us to better understand how chimpanzees distinguish between affiliative and agonistic species and contexts. Publisher PDF

Developing spinal circuits generate patterned motor outputs while many neurons with high membrane resistances are still maturing. In the spinal cord of hatchling frog tadpoles of unknown sex, we found that the firing reliability in swimming of inhibitory interneurons with commissural and ipsilateral ascending axons was negatively correlated with their cellular membrane resistance. Further analyses showed that neurons with higher resistances had outward rectifying properties, low firing thresholds, and little delay in firing evoked by current injections. Input synaptic currents these neurons received during swimming, either compound, unitary current amplitudes, or unitary synaptic current numbers, were scaled with their membrane resistances, but their own synaptic outputs were correlated with membrane resistances of their postsynaptic partners. Analyses of neuronal dendritic and axonal lengths and their activities in swimming and cellular input resistances did not reveal a clear correlation pattern. Incorporating these electrical and synaptic properties into a computer swimming model produced robust swimming rhythms, whereas randomizing input synaptic strengths led to the breakdown of swimming rhythms, coupled with less synchronized spiking in the inhibitory interneurons. We conclude that the recruitment of these developing interneurons in swimming can be predicted by cellular input resistances, but the order is opposite to the motor-strength-based recruitment scheme depicted by Henneman’s size principle. This form of recruitment/integration order in development before the emergence of refined motor control is progressive potentially with neuronal acquisition of mature electrical and synaptic properties, among which the scaling of input synaptic strengths with cellular input resistance plays a critical role.SIGNIFICANCE STATEMENTThe mechanisms on how interneurons are recruited to participate in circuit function in developing neuronal systems are rarely investigated. In 2-d-old frog tadpole spinal cord, we found the recruitment of inhibitory interneurons in swimming is inversely correlated with cellular input resistances, opposite to the motor-strength-based recruitment order depicted by Henneman’s size principle. Further analyses showed the amplitude of synaptic inputs that neurons received during swimming was inversely correlated with cellular input resistances. Randomizing/reversing the relation between input synaptic strengths and membrane resistances in modeling broke down swimming rhythms. Therefore, the recruitment or integration of these interneurons is conditional on the acquisition of several electrical and synaptic properties including the scaling of input synaptic strengths with cellular input resistances.

This research was made possible by a grant (“Misrecognising Minorities in Europe”) from the Volkswagen Foundation, Germany. Political theory is interested in the misrecognition of identity because it impacts individuals’ autonomy in their self-definition and thus their ability to articulate and pursue identity-related interests. Here, we explore minority group members’ experiences of being seen in terms that do not accord with their self-definition. Our data are qualitative, gathered through walking interviews with 24 Muslims in Scotland. Focusing on interactions in which they reported discrepancies between how they and others saw them, we differentiate four forms of misrecognition: i. Having the meaning of a valued identity (i.e., one’s Muslim identity) defined by others in ways that one judges inaccurate and inappropriate; ii. Having one’s membership of a valued community (e.g. as a member of Scottish society) denied or rejected; iii. Having one’s identity (i.e., one’s Muslim identity) overlooked such that one’s distinctive identity-related needs are not taken into account; iv. Being seen in terms of just one of one’s many social identities (i.e., one’s Muslim identity) such that other identities (judged more situationally relevant) are ignored. This empirically-grounded typology contributes to wider debates about the forms of identity (mis)recognition and their political implications. Publisher PDF

Funding: Royal Zoological Society of Scotland for providing core funding for Budongo Conservation Field Station. This research was supported by the University of Neuchâtel and the Swiss National Science Foundation (Project Grant #310030_185324 and NCCR Evolving Language, Agreement #51NF40_180888). An ongoing debate in animal behaviour research is whether food calls function to cooperatively inform others or provide the caller with competitive advantages. When feeding, chimpanzees, Pan troglodytes, produce two types of call: context-specific, close-range ‘rough grunts’ and context-general, long-range ‘pant hoots’. We investigated this dual signalling behaviour by wild male chimpanzees that were either actively joining others or passively being joined in food trees, considering the effects of the audience composition and the type of food encountered. For arriving individuals, we found that pant hoot production was best explained by the absence of socially important individuals (i.e. social bond partners and/or high-ranking males), suggesting that callers were cooperatively informing them about food availability, probably to strengthen social relationships. In contrast, rough grunts were mostly produced by low-ranking individuals, suggesting they were part of competitive interactions to avoid aggression. For individuals already in a tree, we found that both rough grunt and pant hoot production were most common in low-ranking individuals reacting to the arrival of high-ranking males and there was no significant effect of the presence, or absence, of social bond partners. We discuss these patterns and conclude that, when chimpanzees enter a food tree, their vocal behaviour functions to mediate both cooperative and competitive interactions. Publisher PDF

Funding: SEK was partially supported by Templeton World Charity Foundation grant TWCF0540. Animal-visitor interactions are widely available in zoos and aquariums, yet the effects of these programmes on the welfare of the animals involved have only recently begun to be studied. The impact of one type of animal-visitor interaction, public hand feeding experiences, on the welfare of the participating Masai giraffe Giraffa tippelskirchi and the plains zebra Equus quagga co-housed with them was investigated, via behavioural observations before the public feeding season began and during the feeding season. A less time-intensive behavioural sampling method was used that allowed on-duty zookeepers to collect all the data. There were no negative behavioural effects of the public feeding experiences on the giraffe or zebra, including no effects of numbers of guests on rates of stereotypic behaviour and no increase in stereotypic behaviour over time. Rates of stereotypic behaviour were similar to those found previously using more time-intensive behavioural sampling methods. There were individual differences in rates of stereotypic behaviour in giraffe and differences in non-stereotypic behaviour between study phases in both species, which warrant further investigation. This study, for the first time, provides data on the behavioural effects of a public feeding programme on non-participating animals in a mixed-species exhibit, and further demonstrates a method of behavioural sampling that can be incorporated into the daily routine of zookeepers. Publisher PDF

This research was made possible by a grant (‘Misrecognising Minorities in Europe’) from the Volkswagen Foundation, Germany. The comprehensive analysis of social identity cannot simply focus on individuals’ cognitive self-definition. Rather it should also theorise the social conditions that affect individuals’ opportunities to act in terms of those self-definitions. We argue that the social distancing interventions associated with Covid-19 provide an opportunity to explore the significance of otherwise taken-for-granted social factors which routinely support and sustain individuals’ identity enactments. Using qualitative data gathered with 20 members of the Scottish Muslim community (19 diary entries and 20 post-diary interviews), we explore their experiences of restricted access to community-relevant social spaces (e.g., mosques and prayer rooms). Our analysis shows that whilst these regulations could result in new opportunities for Muslims’ religious identity enactments, they also impeded their abilities to act in terms of their religious identification. Addressing such impediments, we develop our understanding of the contextual factors that impact individuals’ abilities to enact identity-defining norms and values. Publisher PDF

Funding: The research of A.M.S. was supported by a ‘INQMINDS’ ERC Starting Grant no. (SEP-210159400). Attentional set shifting is a core ingredient of cognition, allowing for fast adaptation to changes in the environment. How this skill compares between humans and other primates is not well known. We examined performance of 3- to 5-year-old children and chimpanzees on a new attentional set shifting task. We presented participants with two shelves holding the same set of four boxes. To choose the correct box on each shelf, one has to switch attention depending on which shelf one is currently presented with. Experiment 1 (forty-six 3- to 5-year olds, predominantly European White) established content validity, showing that the majority of errors were specific switching mistakes indicating failure to shift attention. Experiment 2 (one hundred and seventy-eight 3- to 6-year olds, predominantly European White) showed that older children made fewer mistakes, but if mistakes were made, a larger proportion were switching mistakes rather than ‘random’ errors. Experiment 3 (52 chimpanzees) established suitability of the task for non-human great apes and showed that chimpanzees' performance was comparable to the performance of 3- and 4-year olds, but worse than 5-year olds. These results suggest that chimpanzees and young children share attentional set shifting capacities, but that there are unique changes in the human lineage from 5 years of age. Publisher PDF

Funding: Royal Zoological Society of Scotland provide core funding to Budongo Conservation Field Station. Finally, we thank the European Research Council for funding this project under Gestural Origins Grant No: 802719 and NCCR Evolving Language, Swiss National Science Foundation Agreement #51NF40_180888. Dialects are a cultural property of animal communication previously described in the signals of several animal species. While dialects have predominantly been described in vocal signals, chimpanzee leaf-clipping and other ‘leaf-modifying’ gestures, used across chimpanzee and bonobo communities, have been suggested as a candidate for cultural variation in gestural communication. Here we combine direct observation with archaeological techniques to compare the form and use of leaf-modifying gestures in two neighbouring communities of East African chimpanzees. We found that while both communities used multiple forms, primarily within sexual solicitation, they showed a strong preference for a single, different gesture form. The observed variation in form preference between these neighbouring communities within the same context suggests that these differences are, at least in part, socially derived. Our results highlight an unexplored source of variation and flexibility in gestural communication, opening the door for future research to explore socially derived dialects in non-vocal communication. Publisher PDF

Funding: MA and SW have both received ESRC SGSSS PhD Collaborative studentships, where additional funding has been provided by Paths for All. AN has been funded by an University of Edinburgh CAHSS Knowledge Exchange grant. Background : Walking is an integral part of Scotland's National Physical Activity Strategy, and the charity Paths for All's Workplace Step Count Challenge is a flagship programme within this strategy to promote physical activity. Effectively promoting physical activity requires collaborative engagement between stakeholders. However, there is limited guidance on how to do this. The aim of this case study is to share an example of a partnership between Paths for All and researchers to inform the development and delivery of the Workplace Step Count Challenge. Method : An overview of the partnership, example activities, reflections on opportunities and challenges, and suggestions for future partnership working are considered. Results : The partnership has evolved and strengthened over time through building trust. Many of the research activities provide an evidence base for the intervention. This work is mutually beneficial providing support for the work of the organisation, and opportunities for researchers to undertake “real world” research, leading to formal outputs and funding. The “real world” nature is challenging to integrate the most robust research designs. Recommendations for developing future partnerships were identified. Conclusion : Promoting physical activity effectively requires partnership working, and this paper provides insight into how such partnerships can work to inform future collaborations. Publisher PDF

This research was partially supported by funding from the Faculty of Humanities career development grant at the University of Oslo [PI: Patel-Grosz]; Matthew Henderson, Kirsty Graham and Catherine Hobaiter received research funding from the European Union’s 8th Framework Programme, Horizon 2020, under grant agreement no 802719 [PI: Hobaiter]. The last decades have seen major advances in the study of gestures both in humans and non-human primates. In this paper, we seriously examine the idea that there may be gestural form types that are shared across great ape species, including humans, which may underlie gestural universals, both in form and meaning. We focus on one case study, the hand fling gesture common to chimpanzees and humans, and provide a semantic analysis of this gesture. Publisher PDF

This research was partly supported by a senior postdoctoral research grant from the Research Foundation—Flanders (FWO) awarded to Jasper VanAssche (FWO.3E0.2021.0085.01) under the supervision of Arne Roets. Data collection for the South African studies was supported by the Max Planck Institute for the Study of Religious and Ethnic Diversity, for which the authors thank Steve Vertovec. This research was also funded by grants from the NORFACE ERA NET Plus Migration in Europe program, TheLeverhulme Trust, and the Central Community Relations Unit. Intergroup contact provides a reliable means of reducing prejudice. Yet, critics suggested that its efficacy is undermined, even eliminated, under certain conditions. Specifically, contact may be ineffective in the face of threat, especially to (historically) advantaged groups, and discrimination, experienced especially by (historically) disadvantaged groups. We considered perceived intergroup threat and perceived discrimination as potential moderators of the effect of contact on prejudice. Two meta-analyses of correlational data from 34 studies (totaling 63,945 respondents-drawn from 67 subsamples across 19 countries) showed that contact was associated with decreased prejudice and increased out-group positivity, in cross-sectional and longitudinal designs, among advantaged and disadvantaged group members, and in both Western, Educated, Industrialized, Rich, and Democratic (WEIRD) and non-WEIRD contexts. Both perceived threat and perceived discrimination moderated the contact-attitude association, but in an unanticipated direction. Indeed, contact's beneficial effects were at least as strong among individuals high (r = .19) as among individuals low (r = .18) in perceived threat. Similarly, the effects of contact were at least as strong among those high (r = .23) as among those low (r = .20) in perceived discrimination. We conclude that contact is effective for promoting tolerant societies because it is effective even among subpopulations where achieving that goal might be most challenging. Postprint

Studies focusing on physics undergraduate students have found that women tend not to identify as strongly with physics, compared to men. Recent research has examined potential factors that influence the experience of women in physics. Several of these factors, such as students' beliefs in their ability to complete physics-based tasks (i.e., self-efficacy) and students' belief that others perceive them as a physicist (i.e., perceived recognition), have been associated with physics identity in the context of introductory university physics courses in the United States (US). The current study extends this previous work, surveying students at all levels of the undergraduate degree at a research-intensive university in the UK. Students were asked about their physics identity, physics self-efficacy, and the extent to which they believed others perceived them as physicists. The survey responses were then matched with students' grades. Using matched responses from the start and end of an academic year from 169 students (110 men, 59 women), two analyses were performed. The first analysis found that average scores for women for physics identity, and self-efficacy were lower than for men both at the start and end of the academic year. The second analysis found that after controlling for the start-of-year scores in physics identity, self-efficacy, and perceived recognition, students' mid-year grades significantly predicted variance in their end-of-year scores for self-efficacy, perceived recognition, and (possibly also) physics identity. This study also found that the gap in perceived recognition between men and women increased over the academic year. The results contribute to understanding potential barriers for women in physics and have implications for instruction in terms of promoting students' physics identity, self-efficacy, and perceived recognition. Publisher PDF

Introduction Recent years have witnessed the global rise of illiberal regimes, which built widespread support by initiating hate campaigns against minorities. This research examined a government-led anti-LGBT campaign in Poland and its impact upon attitudes of the wider public. Methods Our study (N = 2061 heterosexual participants) assessed sexual prejudice (blatant dehumanization and modern homonegativity) and pro- and anti-minority action intentions in two representative surveys, conducted before (fall 2018; N = 821) and after (summer 2019; N = 1240) the beginning of the anti-LGBT campaign. Results Prejudice and anti-minority action tendencies increased during the analyzed period. However, there was also an increase in pro-minority action tendencies, demonstrating public resistance. These effects were moderated by respondents’ levels of social conservatism and their prior contact with LGBT people. Low (compared to high) levels of social conservatism reduced (or even reversed) the impact of the state-sponsored anti-LGBT campaign on sexual prejudice, which further translated into pro- and anti-minority collective action intentions. High (compared to low) levels of contact predicted a reduced effect of the campaign on blatant dehumanization, which translated into lower anti-minority action tendencies. Blatant dehumanization and modern homonegativity differentially predicted participants’ willingness to engage in pro- and anti-minority collective action, highlighting the importance of taking a more granular approach when predicting action intentions. Policy Implications We discuss implications for interventions aimed at protecting vulnerable groups in the face of anti-minority rhetoric.

This work was supported by Harvard University. Indirect wildlife population surveying largely depends upon counts of artifacts of behavior (e.g., nests or dung). Likelihood to encounter these artifacts is derived from both artifact production and decay, and variability in production behavior is considered to contribute minimally to inaccuracy in wildlife estimation. Here, we demonstrate how ignoring behavioral variability leads to significant population misestimation, using an example of an endangered ape, the bonobo (Pan paniscus). Until now, a single estimate of nest construction rate has been used to extrapolate bonobo densities, assumed to be broadly representative of bonobo sign production behavior. We estimated nest construction rates across seasons and social groups at the Kokolopori Bonobo Reserve, Democratic Republic of the Congo, and find nest construction rates in bonobos to be highly variable across populations as well as seasonal within populations. Failure to account for this variability led to degradation in the accuracy of bonobo population density estimates, accounting for a likely overestimation of bonobo numbers by 34%, and at worst as high as 80%. With this example, we demonstrate that failure to account for inter- and intrapopulation behavioral variation compromises the ability to estimate both relative and absolute wildlife abundances. We argue that variation in sign production is but one of the several potential ways that behavioral variability can affect conservation monitoring, should be measured across contexts whenever possible, and must be considered in population estimation confidence intervals. With increasing attention to behavioral variability as a potential tool for conservation, conservationists must also account for the impact that behavioral variability can have upon wildlife population estimation. Our results underline the importance of observational research to wildlife monitoring schemes as a critical component of conservation management. We discuss the avenues through which behavioral variability is likely to impact wildlife monitoring accuracy and precision and propose potential approaches for accounting for behavioral variability in wildlife monitoring. Publisher PDF

Funding: This work was supported by a Medical Research Scotland vacation award for BM, Sulsa Dementia grants to JH & GHD. Key pathological features of Alzheimer’s disease (AD) include build-up of amyloid β (Aβ), which promotes synaptic abnormalities and ultimately leads to neuronal cell death. Metabolic dysfunction is known to influence the risk of developing AD. Impairments in the leptin system have been detected in AD patients, which has fuelled interest in targeting this system to treat AD. Increasing evidence supports pro-cognitive and neuroprotective actions of leptin and these beneficial effects of leptin are mirrored by a bioactive leptin fragment (leptin116-130). Here we extend these studies to examine the potential cognitive enhancing and neuroprotective actions of eight six-amino acid peptides (hexamers) derived from leptin116-130. In this study, we show that four of the hexamers (leptin116-121, 117-122, 118-123 and 120-125) replicate the ability of leptin to promote α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor trafficking and facilitate hippocampal synaptic plasticity. Moreover, the pro-cognitive effects of the hexamers were verified in behavioural studies, with administration of leptin117-122 enhancing performance in episodic memory tasks. The bioactive hexamers replicated the neuroprotective actions of leptin by preventing the acute hippocampal synapto-toxic effects of Aβ, and the chronic effects of Aβ on neuronal cell viability, Aβ seeding and tau phosphorylation. These findings provide further evidence to support leptin and leptin-derived peptides as potential therapeutics for AD. Publisher PDF

Funding: This work was supported with funding by the Swiss National Science Foundation (grant PZ00P3_154741 (CDD), 310030_185324 (KZ), and NCCR Evolving Language (Agreement #51NF40_180888 (KZ)), and the Taipei Medical University (Startup-funding, grant 108-6402-004-112 (CDD)). Human economic decision-making sometimes appears to be irrational. Partly, this is due to cognitive biases that can lead to suboptimal economic choices and context-dependent risk-preferences. A pertinent question is whether such biases are part of our evolutionary heritage or whether they are culturally acquired. To address this, we tested gorillas (Gorilla gorilla gorilla) and orang-utans (Pongo abelii) with two risk-assessment experiments that differed in how risk was presented. For both experiments, we found that subjects increased their preferences for the risky options as their expected gains increased, showing basic understanding of reward contingencies and rational decision-making. However, we also found consistent differences in risk proneness between the two experiments, as subjects were risk-neutral in one experiment and risk-prone in the other. We concluded that gorillas and orang-utans are economically rational but that their decisions can interact with pre-existing cognitive biases which modulates their risk-preference in context-dependent ways, explaining the variability of their risk-preference in previous literature. Publisher PDF

Funding: The author was supported by a Leverhulme Trust Research Project grant no. RPG-2016-269. The dominant inferential approach to human 3D perception assumes a model of spatial encoding based on a physical description of objects and space. Prevailing models based on this physicalist approach assume that the visual system infers an objective, unitary and mostly veridical representation of the external world. However, careful consideration of the phenomenology of 3D perception challenges these assumptions. I review important aspects of phenomenology, psychophysics and neurophysiology which suggest that human visual perception of 3D objects and space is underwritten by distinct and dissociated spatial encodings that are optimized for specific regions of space. Specifically, I argue that 3D perception is underwritten by at least three distinct encodings for (1) egocentric distance perception at the ambulatory scale, (2) exocentric distance (scaled depth) perception optimized for near space, and (3) perception of object shape and layout (unscaled depth). This tripartite division can more satisfactorily account for the phenomenology, psychophysics and adaptive logic of human 3D perception. Publisher PDF

Funding: This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No. [639072]). We acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), [funding reference number 2016-05552]. The use of abstract higher-level knowledge (also called overhypotheses) allows humans to learn quickly from sparse data and make predictions in new situations. Previous research has suggested that humans may be the only species capable of abstract knowledge formation, but this remains controversial. There is also mixed evidence for when this ability emerges over human development. Kemp et al. (2007) proposed a computational model of how overhypotheses could be learned from sparse examples. We provide the first direct test of this model: an ecologically valid paradigm for testing two species, capuchin monkeys (Sapajus spp.) and 4- to 5-year-old human children. We presented participants with sampled evidence from different containers which suggested that all containers held items of uniform type (type condition) or of uniform size (size condition). Subsequently, we presented two new test containers and an example item from each: a small, high-valued item and a large but low-valued item. Participants could then choose from which test container they would like to receive the next sample – the optimal choice was the container that yielded a large item in the size condition or a high-valued item in the type condition. We compared performance to a priori predictions made by models with and without the capacity to learn overhypotheses. Children's choices were consistent with the model predictions and thus suggest an ability for abstract knowledge formation in the preschool years, whereas monkeys performed at chance level. Publisher PDF