Sex and age group differences in the associations between sleep duration and BMI from adolescence to young adulthood

Objective: We examine concurrent and longitudinal associations between sleep duration (SD) and body mass index (BMI) from adolescence to young adulthood, controlling for physical activity and internalising symptoms. Sex and age group differences (early adolescent group ages 12–15 years and late adolescent group ages 16–18 years) are examined.

Design: A randomly selected community-based sample of youth (N = 662; 48.3% males) were surveyed biannually from 2003 (T1) to 2014 (T6).

Results: We found sex and age group differences for the concurrent and longitudinal associations between SD and BMI. For males, shorter SD at baseline was concurrently related to higher BMI. For females, shorter SD at baseline was associated with longitudinal increases in BMI, for the late adolescent group only.

Conclusion: Findings show that the association between SD and BMI, previously shown in childhood, continues to be significant in adolescence and young adulthood. Developmentally appropriate and sex-specific strategies for motivating and supporting healthy sleep habits in adolescence that may help to prevent weight gain into young adulthood are discussed.     

Other-Initiated Motivational Climate and Youth Hockey Players’ Good and Poor Sport Behaviors

This study's purpose was to simultaneously examine the relationships between perceived coach-, peer-, and parent-initiated motivational climate and youth hockey players’ good and poor sport behavior (GPSB). Participants (N = 243) represented PeeWee, Bantam, and Midget hockey levels (11–17 years old). Hierarchical regression showed that hockey players’ goal orientations, perceived ability, and other-initiated motivational climate explained 22.6% (PeeWee) and 18.5% (Bantam/Midget) of the variance in Poor Sport Behavior while explaining 27.1% (PeeWee) and 34.6% (Bantam/Midget) of the variance in good sport behavior. Results provide perspective for how influential the social environment is to both GPSBs in youth hockey.     

Youth Negative Affect Attenuates Associations Between Compromise and Mother–Adolescent Conflict Outcomes

The study of conflict processes often focuses on the manner in which disagreements are resolved, such that relationship deterioration is a product of the failure to negotiate. However, conflict management tactics may not be the most salient feature of parent–adolescent conflicts because these relationships are obligatory, with power unevenly distributed, and negotiated resolutions unanticipated. Instead, parent–adolescent relationships may be more sensitive to the affective tenor of the interchange than the manner in which the dispute is resolved. In two studies, we examined the premise that relationship damage arising from disagreements between mothers and adolescent children is a product of negative affect and failure to compromise. Concurrent analyses involved reports from 101 (33 boys, 68 girls) adolescents (M = 13.89 years old) about conflict with mothers. Longitudinal analyses involved reports from 271 (112 boys, 159 girls) adolescents (M = 11.6 years old at the outset) about conflict with mothers at two time points 1 year apart. Compromise and youth negative affect were moderately correlated; when both were included as predictors of adverse relationship consequences arising from conflict, negative affect accounted for almost all of the variance, concurrently and prospectively. Scholars and practitioners who advise families that negotiated resolutions to disagreements help to avoid relationship disruption may be discouraged in their efforts unless a similar emphasis is placed on minimizing negative affect.     

Creating political websites: Balancing complexity &; usability

By integrating what is known about how people navigate the overwhelming tide of political information with research on usability, the experiments reported in this article aim to provide information about how to create political websites that are usable, engaging, and educational. This article reports on a series of four different experiments (n=478) comparing a simpler and more easily navigable website to a more complex and interactive website. The types of websites tested include: adwatches, issue grids, candidate biographies, and campaign finance sites. The results suggest that simpler, more navigable websites are preferred to more interactive websites with web tools. Results also suggest that more political information is not always preferable, as in most cases, participants rated sites with more political information lower. Brett A. Mueller received a master’s degree from the Annenberg School for Communication in 2002. This research is supported by a grant from The Pew Charitable Trusts; Dr. Kathleen Hall Jamieson, Primary Investigator. The authors than Joyce Garczynski, Jon Stromer-Galley, Svjetlana Tepavcevic, and Dannagal Goldthwaite Young for their work on the project.     

Linguistic convention and worldly fact

Philosophical Studies - Truth by convention, once thought to be the foundation of a uniquely promising approach to explaining our access to the truth in nonempirical domains, is nowadays widely...     

Correction to: Linguistic convention and worldly fact

Philosophical Studies - The original publication of the article contains two formatting errors, the second of which significantly inhibits readability.     

Theorizing cumulative dehumanization: An embodied praxis of “becoming” and resisting state‐sanctioned violence

This paper introduces a new conceptual framework referred to as “cumulative dehumanization” to better understand the ways in which dehumanization penetrates individual and collective bodies and minds, cutting across policy and ideology and accumulating materially and affectively over time and space. Cumulative dehumanization illuminates a web of vertical and horizontal, synthetic, and dynamic processes that result in an ongoing racialized, state‐sanctioned dehumanization that is fundamentally cumulative—both temporally and spatially—with a profusion of consequences attached. Within the landscape of aggressive surveillance and policing, we illuminate how cumulative dehumanization can be conceptualized as (i) an active condition of becoming, experienced as an accumulation of dehumanizing moments, structurally imposed on racialized communities under siege; (ii) a wearing down of the racialized and affective body, creating circuits of dispossession for entire communities; (iii) a product and (re)producer of the material and ideological modes undergirding racial capitalism; and (iv) a force met with individual and collective resistance. Linking literature on racial capitalism and affect, to the embodied social psychological phenomenon of dehumanization, cumulative dehumanization serves as a useful conceptual tool to examine the historical legacy of, processes embedded within, and entirety of collective consequences including resistance as inextricably linked. In doing so, we reveal the indivisibility of cognitive, embodied, psychological, social, material, ideological, and political circuits.     

Improving Human‐Machine Cooperative Classification Via Cognitive Theories of Similarity

Acquiring perceptual expertise is slow and effortful. However, untrained novices can accurately make difficult classification decisions (e.g., skin‐lesion diagnosis) by reformulating the task as similarity judgment. Given a query image and a set of reference images, individuals are asked to select the best matching reference. When references are suitably chosen, the procedure yields an implicit classification of the query image. To optimize reference selection, we develop and evaluate a predictive model of similarity‐based choice. The model builds on existing psychological literature and accommodates stochastic, dynamic shifts of attention among visual feature dimensions. We perform a series of human experiments with two stimulus types (rectangles, faces) and nine classification tasks to validate the model and to demonstrate the model's potential to boost performance. Our system achieves high accuracy for participants who are naive as to the classification task, even when the classification task switches from trial to trial.