Search

Hunger is a powerful driver of eating behaviour. However, the relationship between hunger and food-related cognition remains poorly understood. Previous research found that hunger increased the ability of food cues to capture attention in a US student sample (N=23; Piech, Pastorino, & Zald, Appet., 54, p579-582, 2010). We conducted online (N=29) and in-person (N=28) replications of this study with British participants, using the same stimuli sets and protocols as the original study, with a Bayesian analytical approach. The studies use the Emotional Blink of Attention (EBA) task, in which participants must identify a rotated image in a Rapid Serial Visual Presentation. The targets are preceded by distractors – “neutral”, “romantic”, or “food” images. We predicted that food images would create a greater attentional blink when participants were hungry than when they were sated, but romantic and neutral images would not. Our participants completed the task twice, at the same time of day, on two different days, 6-11 days apart; once when hungry (overnight plus 6h fast) and once when sated (after eating a self-selected lunch in the preceding hour). Our results did not support the original finding that hunger increases attentional capture by food cues, despite both of our experiments passing manipulation and quality assurance checks. While the lack of replication of the original finding may result from differences in the sample, responses to stimuli, or other limitations, it is also possible that the original finding may not be generalisable. This may be explained by the sensitivity of the EBA paradigm to the physical distinctiveness of distractors from filler and target images, rather than the emotional valence of the distractors, as previously thought. Our studies were pre-registered on Open Science Framework (https://osf.io/w2a8f and https://osf.io/v4wpt).

Impulsivity refers to the valuation of future rewards relative to immediate ones. From an evolutionary perspective, we should expect impulsivity to be sensitive to the current state of the organism (for example, hunger), and also its long-term developmental history. There is evidence that both current hunger and childhood socioeconomic deprivation are individually associated with impulsivity, but it is not known how these combine. For example, acute hunger might over-ride social gradients in baseline impulsivity, or alternatively, individuals who have experienced greater deprivation might respond more strongly to acute hunger. We aimed to investigate whether hunger and childhood socioeconomic deprivation act additively or interactively in three studies utilising delay discounting tasks. Childhood socioeconomic deprivation was measured using childhood postcode and a self-report measure. In two studies hunger was experimentally manipulated (n = 95 & n = 93 respectively), and in the third we simply measured natural variation. We employed a standard hypothetical delay discounting task in two studies, and a behavioural task with experienced delays in the third (n = 330). Although the individual studies varied in which predictors were statistically significant, when we meta-analysed them, a clear pattern emerged. Hunger predicted greater impulsivity; childhood socioeconomic deprivation predicted greater impulsivity; and these two effects were additive rather than interactive.

Understanding nitrogen oxides (NOx = NO + NO2) measurement techniques is important as air-quality standards become more stringent, important sources change, and instrumentation develops. NOx observ...

PurposeTo describe our experience of offering simultaneous genetic carrier screening for cystic fibrosis (CF), fragile X syndrome (FXS), and spinal muscular atrophy (SMA).MethodsCarrier screening is offered through general practice, obstetrics, fertility, and genetics settings before or in early pregnancy. Carriers are offered genetic counseling with prenatal/preimplantation genetic diagnosis available to those at increased risk.ResultsScreening of 12,000 individuals revealed 610 carriers (5.08%; 1 in 20): 342 CF, 35 FXS, 241 SMA (8 carriers of 2 conditions), approximately 88% of whom had no family history. At least 94% of CF and SMA carriers' partners were tested. Fifty couples (0.42%; 1 in 240) were at increased risk of having a child with one of the conditions (14 CF, 35 FXS, and 1 SMA) with 32 pregnant at the time of testing. Of these, 26 opted for prenatal diagnosis revealing 7 pregnancies affected (4 CF, 2 FXS, 1 SMA).ConclusionThe combined affected pregnancy rate is comparable to the population risk for Down syndrome, emphasizing the need to routinely offer carrier screening. The availability of appropriate genetic counseling support and a collaborative approach between laboratory teams, genetics services, health professionals offering screening, and support organizations is essential.

Cultural practices may either enhance or interfere with evolved preferences as predicted by culture–gene coevolution theory. Here, we investigated the impact of artificial fragrances on the assessment of biologically relevant information in human body odor. To do this, we examined cross-sensory consistency (across faces and odors) in the perception of masculinity and femininity in men and women, and how consistency is influenced by the use of artificial fragrance. Independent sets of same and opposite-sex participants rated odor samples (with and without a fragrance, n =239 raters), and photographs ( n =130) of 20 men and 20 women. In female, but not male raters, judgments of masculinity/femininity of non-fragranced odor and faces were correlated. However, the correlation between female ratings of male facial and odor masculinity was not evident when assessing a fragranced body odor. Further analysis also indicated that differences in ratings of male odor masculinity between men with high and low levels of facial masculinity were not present in fragranced body odor samples. This effect was absent in ratings of female odors by both female and male raters, suggesting sex-specificity in the effects of fragrance on odor perception. Our findings suggest that women may be more attentive to these odor cues, and therefore also to disruption of this information through fragrance use. Our results show that cultural practices might both enhance and interfere with evolved preferences.

There is substantial evidence for assortative partner preferences in humans based on physical characteristics. In contrast, evidence suggests that olfactory preferences tend to be disassortative, with people preferring body odour of potential partners who are dissimilar at key genetic loci, perhaps to gain fitness advantage through offspring heterozygosity. We compared ratings of perceived body odour similarity of real couples with those of randomly paired 'fake' couples. Contrary to prediction, we find that odours of real partners are perceived more, rather than less, similar to each other than fake couples. However, this applied only to natural odour samples: there were no differences in similarity levels of real and fake couples' samples which were collected while wearing artificial fragrances. Furthermore, in light of suggestions that hormonal contraception (HC) disrupts disassortative odour preferences in women, we compared odour similarity among real couples in which the female partner was using or not using HC at the time when the relationship began. We find that odours of HC-using couples are of intermediate similarity between non-using and fake couples, suggesting that HC use during partner choice could affect odour-influenced assortment. We also examined the association between relationship satisfaction and perceived similarity of unfragranced odours of real couples. We found that these are positively correlated in male partners but negatively correlated in the female partners, indicative of a sex difference in the relative favourability of odour similarity in partner preference. Finally, by comparing odour similarity ratings with those given by perfumers using a novel olfactory lexicon we found evidence that similarity judgements were based on the Spicy/Animalic aspects of individual odour profiles. Taken together, our results challenge the conventional view that odour-mediated partner preferences in humans are typically disassortative.

Background The prevalence of self-identified chronic pain in Canadian adults is approximately one in five people. Marginalization and addictions have been shown to complicate chronic pain in vulnerable populations. This study aimed to understand the experience of chronic pain among female Survival Sex Workers in Vancouver's downtown eastside (DTES). Methods This study used an exploratory qualitative analysis with in-depth, semi-structured interviews. Members of PACE Society who self-identified as a current or former Survival Sex Worker and who had a chronic pain experience known to PACE support workers were invited to participate. Interviews were conducted, audio recorded and transcribed. The investigators met to read the transcripts and discuss emerging themes. The process continued until no new themes were observed. Results Participants ranged in age from 42 to 56 years old and all self- identified as females and Survival Sex Workers. Eleven of thirteen interviews were analyzed for themes. Drug use for pain management, both prescribed and illicit, was the most important theme. Poverty, the need to continue working and the lack of stable housing were barriers to adequately addressing the source of chronic pain. Participants felt judged for living in the downtown eastside, being a drug user and/or being Aboriginal and only two participants had been referred to a pain specialist. All participants were involved in support networks made up of other Sex Workers and all spoke of a sense of community and survival. Conclusions Our study emphasizes the complex nature of chronic pain and addictions among a uniquely marginalized population. The study is unique in that it contributes the perspectives of a traditionally “hard-to-reach” population and demonstrates that Sex Workers should not only participate in but should lead development and implementation of research and programs for managing chronic pain in the setting of addiction.

Previous research suggests that artificial fragrances may be chosen to complement or enhance an individual’s body odor, rather than simply masking it, and that this may create an odor blend with an emergent quality that is perceptually distinguishable from body odor or fragrance alone. From this, it can be predicted that a new emergent odor might be more easily identified than an individual’s body odor in isolation. We used a triangle test paradigm to assess whether fragrance affects people’s ability to distinguish between individual odors. Six male and six female donors provided axillary odor samples in three conditions (without fragrance, wearing their own fragrance, and wearing an assigned fragrance). In total, 296 female and 131 male participants selected the odd one out from three odor samples (two from one donor, one from another; both of the same sex). We found that participants could discriminate between the odors at above chance levels in all three odour conditions. Olfactory identification ability (measured using Sniffin’ Sticks) positively predicted discrimination performance, and sex differences in performance were also observed, with female raters being correct more often than men. Success rates were also higher for odors of male donors. Additionally, while performance was above chance in all conditions, individual odor discrimination varied across the three conditions. Discrimination rate was significantly higher in the ‘no fragrance’ condition than either of the fragranced conditions. Importantly, however, discrimination rate was also significantly higher in the ‘own fragrance’ condition than the ‘assigned fragrance’ condition, suggesting that naturally occurring variance in body odor is more preserved when blended with fragrances that people choose for themselves, compared with other fragrances. Our data are consistent with the idea that fragrance choices are influenced by fragrance interactions with an individual’s own body odor.

not Available.

Aim To determine the hepatitis B, tuberculosis (TB), varicella and rubella immunisation status of dental practice workers in Kent. Method A cross-sectional survey using a) a dental practice questionnaire sent to all 275 registered dental practices in Kent in February 2005, to determine the numbers of staff employed and their job titles, and b) a confidential personal health questionnaire for every staff member employed by each practice, to determine past history of infections and immunisation history. Results Two hundred out of 257 (78%) dental practices took part in the survey, and 1,415 staff (76% of known participants) returned completed personal health questionnaires. Three hundred and eighty-four out of 395 dentists (97%) indicated previous immunisation against hepatitis B. The corresponding percentages for other occupational groups were dental hygienists (94%), nurses (89%), dental therapists (75%), and other non-clinical staff (65%). 1,197 (85%) of participants reported previous chicken pox and/or shingles; 1,208 (85%) gave a history of previous immunisation against TB; and 823 (58%) had either had rubella or were immunised against rubella. Male participants were less likely to have had rubella immunisation. Conclusions The study has demonstrated the variations in knowledge about personal immunity status amongst dental practice staff for some infectious diseases. Improvement in establishing personal immunity status of individual dental care workers and provision of a vaccination programme could be facilitated. This preventive measure could be arranged through occupational health providers.