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In savanna ecosystems, the seasonal effects of nitrogen forms and availability, as well as their utilization by plants, influence the abundance and distribution of herbaceous species in grassland communities. This study examines seasonal effects on nitrogen availability and utilization by native grass species in the Cerrado, a savanna ecosystem in Brazil. Ammonium and nitrate levels in soil, nitrate acquisition and transport, and Nitrate Reductase Activity (NRA) in different plant parts during dry and wet periods were assessed. Results indicated higher soil nitrate availability during the wet period, influenced by precipitation, with leaves showing a higher nitrate content compared to roots. There was seasonal modulation in nitrate reduction, with leaves being the primary site during the dry period and roots during the wet period. The studied grass species exhibited heterogeneous responses to seasonal nitrogen availability, potentially affecting community abundance patterns. Findings suggest that edaphoclimatic seasonality plays a crucial role in nitrogen distribution and utilization capacity by grass plants in the Cerrado, contributing to the understanding of these ecosystems' ecology. [ABSTRACT FROM AUTHOR]

Marriage has been linked to higher well-being. However, previous research has generally examined marital status at one point in time or over a relatively short window of time. In order to determine if different marital histories have unique impacts on well-being in later life, we conducted a marital sequence analysis of 7,532 participants from the Panel Study of Income Dynamics (54.2% women; Mage = 66.68, SD = 8.50; 68.7% White/Caucasian). Three different marital sequence types emerged: a 'consistently-married' group (79%), a 'consistently-single' group (8%), and a 'varied histories' group (13%), in which individuals had moved in and out of various relationships throughout life. The consistently-married group was slightly higher in well-being at the end of life than the consistently-single and varied histories groups; the latter two groups did not differ in their well-being. The results are discussed in the context of why marriage is linked to well-being across the lifespan. [ABSTRACT FROM AUTHOR]

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Data from Project Implicit were analyzed to explore trends in ableism. Over 300,000 U.S. residents with and without disabilities completed the Disability Implicit Association Test and two measures of explicit prejudice. The most consistent predictors of bias across types of prejudice were gender and contact with individuals with disabilities: Women and those who had contact were less prejudiced. Temporal analyses indicated that mean implicit prejudice increased over time (2004–2017), yet explicit bias showed a decline over the same period. Among people with disabilities, implicit and explicit prejudice were related to lower contact with others who shared one's disability, as well as to perceptions that one's disorder affects few activities and/or is primarily mental or emotional. Theoretical and practical implications are discussed. [ABSTRACT FROM AUTHOR]

Over the past 10 years, crises surrounding replication, fraud, and best practices in research methods have dominated discussions in the field of psychology. However, no research exists examining how to communicate these issues to undergraduates and what effect this has on their attitudes toward the field. We developed and validated a 1-hr lecture communicating issues surrounding the replication crisis and current recommendations to increase reproducibility. Pre- and post-lecture surveys suggest that the lecture serves as an excellent pedagogical tool. Following the lecture, students trusted psychological studies slightly less but saw greater similarities between psychology and natural science fields. We discuss challenges for instructors taking the initiative to communicate these issues to undergraduates in an evenhanded way. [ABSTRACT FROM AUTHOR]

Copyright of Psico-USF is the property of Universidade Sao Francisco, Programa de Pos-Graduacao Stricto Sensu em Psicologia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In different cultures, people use the concept of weight to refer to important matters. Recent studies in grounded cognition suggested that experiences of weight affect unrelated judgments of importance in metaphor-congruent ways. Theories in grounded cognition and prime-to-behavior effects state that sensations of weight activate concepts of importance, which may affect morality-related variables that are influenced by judgments of importance. The present research aimed to test the effect of carrying a heavy (or light) clipboard on the perceived importance of helping and on the judged severity of moral transgressions. After finding no significant effects in two experiments, a third study explored whether these results were due to a specific lack of effect of weight on morality-related variables or to the concept of importance not being grounded in sensations of weight in Brazilian samples. Specifically, in Study 3 we attempted to replicate two seminal studies but found no significant effects. Together with evidence of publication bias in a meta-analysis of published studies, the current results suggest that the concept of importance may not be as universally grounded in sensations of weight as previously assumed. We discuss the implications of these results for grounded cognition theories and methodological and statistical aspects of priming studies. [ABSTRACT FROM AUTHOR]

The article discusses improvement in perceptual model related to determination of intergroup relations through development of evolutionary framework. Topics discussed include illustration of different behaviour of humans such as prosocial behavior, description of variation in human perception, observation of shape perception relationship with intergroup dynamics and development of social context related to intergroup hypothesis.

The authors comment on the dual implicit process model (DIPM) of evaluation reviewed in an article within the issue, which recommends reformulation of dual-process models used in social cognition. It emphasizes the benefit of social cognition research from distinguishing threat-related processes from other evaluative processes, citing limitations of DIPM related to the vagueness and superficiality of automaticity. A strategy to avoid those limitations for future models is suggested.