Parasite stress, ethnocentrism, and life history strategy

Fincher & Thornhill (F&T) present a compelling argument that parasite stress underlies certain cultural practices promoting assortative sociality. However, we suggest that the theoretical framework proposed is limited in several ways, and that life history theory provides a more explanatory and inclusive framework, making more specific predictions about the trade-offs faced by organisms in the allocation of bioenergetic and material resources.     

An experimental manipulation of rejection: Effects on children's attitudes and mood depend on rejection sensitivity and relationship history

Guided by rejection sensitivity (RS) theory, the objective of this study was to test whether children's RS was associated with elevated negative emotional responses (less positive in‐group attitudes and more negative mood) following an episode of overt peer rejection or ambiguous rejection, in comparison to acceptance. Also, the role of children's self‐reported history of peer acceptance was examined. Participants were 206 children (7–11 years) who were randomly assigned to experience rejection, ambiguous rejection, or acceptance in a group simulation study. Children's group liking and negative mood depended on the 3‐way interaction of experimental condition, RS and children's history. In the ambiguous condition, as expected, children with higher RS reported more negative mood, and this did not differ in low compared to high accepted children. However, RS was only associated with less positive group attitudes among high accepted children in the rejection condition, and RS was associated with more negative mood among low accepted children only (in both conditions). Findings show the relevance of RS for elevated negative mood when rejection threat is ambiguous, and the combined role of RS and social history in children's emotional responses when situations are less ambiguous.     

Interactive Team Cognition

Cognition in work teams has been predominantly understood and explained in terms of shared cognition with a focus on the similarity of static knowledge structures across individual team members. Inspired by the current zeitgeist in cognitive science, as well as by empirical data and pragmatic concerns, we offer an alternative theory of team cognition. Interactive Team Cognition (ITC) theory posits that (1) team cognition is an activity, not a property or a product; (2) team cognition should be measured and studied at the team level; and (3) team cognition is inextricably tied to context. There are implications of ITC for theory building, modeling, measurement, and applications that make teams more effective performers.     

The Factor Structure of the COPE Questionnaire in a Sample of Clinically Depressed and Anxious Adults

The Coping Orientation to Problems Experienced is a multidimensional scale designed to assess how people respond to stress. The COPE has been validated in a variety of populations displaying variations in factor structure. However, in terms of mental health populations, it has only been validated in alcohol-dependent samples. This paper investigated the factor structure of the COPE in a sample of adults diagnosed with depression and anxiety. Two hundred and seventy-one patients attending cognitive behaviour therapy for anxiety and depression completed the COPE. Confirmatory factor analysis found a poor fit for both lower order and higher order factors based upon the Lyne and Roger (2000) study. Exploratory factor analyses identified six primary subscales (Active Planning, Social Support, Denial, Acceptance, Disengagement, Restraint) which explained approximately 60% of the variance in coping. These 6 subscales may assist researchers and clinicians to validly measure coping in anxious and depressed adults.     

The issue of drugs and crime among a sample of incarcerated women

Based on a sample of incarcerated women in Quebec prisons in 1989, this study focuses on drug use and abuse and its relation to crime with a special concern for age of onset, nature of conviction, previous involvement in criminal activities, motivation, and other related variables. The emerging profile of these subjects is one of drug‐related problems rather than a deep involvement in criminality. Within this population of women prisoners a strong link between drugs and crime is still difficult to establish. In conclusion, it is suggested that future research rely more on qualitative analyses to gather a better understanding of the operating processes.     

Multi-Party,Whole-Body Interactions in Mathematical Activity

This study interrogates the contributions of multi-party, whole-body interactions to students' collaboration and negotiation of mathematics ideas in a task setting called walking scale geometry, where bodies in interaction became complex resources for students' emerging goals in problem solving. Whole bodies took up overlapping roles representing geometric objects, contributing to the communication and negotiation of problem-solving strategies and engaging as mathematical instruments for representation.     

Pitch characteristics of infant-directed speech affect infants’ ability to discriminate vowels

“Baby talk” or speech directed to prelinguistic infants is high in pitch and has exaggerated pitch contours (up/down patterns of pitch change) across languages and cultures. Using an acoustic model, we predicted that the large pitch contours of infant-directed speech should improve infants’ ability to discriminate vowels. On the other hand, the same model predicted that high pitch would not benefit, and might actually impair, infants’ ability to discriminate vowels. We then confirmed these predictions experimentally. We conclude that the exaggerated pitch contours of infant-directed speech aid infants’ acquisition of vowel categories but that the high pitch of infant-directed speech must serve another function, such as attracting infants’ attention or aiding emotional communication.     

Interaction between amount and pattern of training in the induction of intermediate- and long-term memory for sensitization in aplysia

In Aplysia, three distinct phases of memory for sensitization can be dissociated based on their temporal and molecular features. A single training trial induces short-term memory (STM, lasting <30 min), whereas five trials delivered at 15-min intervals induces both intermediate-term memory (ITM, lasting >90 min) and long-term memory (LTM, lasting >24 h). Here, we explore the interaction of amount and pattern of training in establishing ITM and LTM by examining memory for sensitization after different numbers of trials (each trial = one tail shock) and different patterns of training (massed vs. spaced). Under spaced training patterns, two trials produced STM exclusively, whereas four or five trials each produced both ITM and LTM. Three spaced trials failed to induce LTM but did produce an early decaying form of ITM (E-ITM) that was significantly shorter and weaker in magnitude than the late-decaying ITM (L-ITM) observed after four to five trials. In addition, E-ITM was induced after three trials with both massed and spaced patterns of training. However, L-ITM and LTM after four to five trials require spaced training: Four or five massed trials failed to induce LTM and produced only E-ITM. Collectively, our results indicate that in addition to three identified phases of memory for sensitization—STM, ITM, and LTM—a unique temporal profile of memory, E-ITM, is revealed by varying either the amount or pattern of training.