Dreading the boards: stress response to a competitive audition characterized by social-evaluative threat

The capacity of psychosocial stressors to provoke the hypothalamic–pituitary–adrenal axis has been demonstrated to vary depending upon a number of psychological factors. Laboratory stressors characterized by social-evaluative threat are proposed to be the most efficacious in the elicitation of a cortisol stress response. Salivary cortisol, cardiovascular, and subjective responses of 16 healthy adults facing a naturalistic stressor characterized by social-evaluative threat (competitive performance auditions) were examined. Audition exposure was sufficient to provoke significant cortisol, arterial blood pressure (systolic and diastolic), and subjective stress responses. Cortisol response reactivity (area under the curve with respect to increase [AUCi]) also correlated with participants' subjective rating of social-evaluative threat. The competitive performance audition context is therefore considered a promising context in which to further explore cortisol responsivity to social-evaluative threat.     

Do hands attract attention?

Social stimuli, like faces (Kanwisher, McDermott, & Chun, 1997) or bodies (Downing, Jiang, Shuman, & Kanwisher, 2001), engage specific areas within the visual cortex. Behavioural research reveals an attentional bias to these same stimuli (Ro, Friggel, & Lavie, 2007). The current study examined whether there is an attentional bias towards hands, and whether such a bias is distinct from any bias towards human bodies. In a two-alternative, forced-choice dot-probe task, participants saw two side-by-side pictures for 500 ms. A probe dot then appeared on either side and participants indicated where the dot appeared. Participants were significantly faster to respond when the probe location coincided with the location of pictures of bodies, hands, or feet, compared to dogs, starfish, hand tools, toaster ovens, inverted hands, or inverted bodies. Results suggest an attentional bias to bodies and body parts but found no evidence of a difference in attentional advantage of hands over bodies or feet.     

Measuring trust in teams: Development and validation of a multifaceted measure of formative and reflective indicators of team trust

This article describes the development and validation of a multidimensional instrument designed to measure trust within teams. Trust is conceptualized as a latent variable resulting from distinct but related (formative) indicators, i.e., propensity to trust and perceived trustworthiness, which lead to (reflective) indicators, i.e., behaviours cooperation and monitoring between team members. The instrument was tested in two different samples. The first sample included 98 hospital professionals (14 teams) and provided data for the exploratory factor analysis of this instrument (Study 1). The second sample included responses from 112 teams (395 individuals) from three social-care institutions and was used to apply confirmatory factor analysis (Study 2). Data attesting to the underlying factor structure, internal homogeneity, construct validity, and consensual power of agreement within teams and discriminant power across teams of the instrument are presented. The final 21-item, four-factor version of this measure demonstrates good psychometric properties, with acceptable levels of reliability and validity. We conclude that the scales form a parsimonious, valid, and efficient instrument to assess trust in teams. Potential applications of this measure in research and practice are described and the implications of these findings for future research are discussed.     

Changes in Physiological Stress and Self-Reported Mood in Younger and Older Adults After Exposure to a Stressful Task

ABSTRACT

The objective of the current study was to compare the trajectories of physiological levels of stress and self-report measures of mood in younger and older adults and to examine how a stress induction would affect performance. The current study examined physiological and subjective indicators of stress and mood before, mid-way through, and after being exposed to a stressful computer task. Stress levels and negative affect increased after stress induction relative to levels before and after the stressful task. Practice on the task helped to improve performance (accuracy and reaction time) but high workload measured during the task mitigated accuracy in younger and older adults, whereas it enhanced response speed in younger adults.     

The Uses of Hierarchy: Autonomy and Valuing

Abstract

Autonomy and valuing are two significant practical phenomena that have been analysed in terms of higher-order wanting. I argue that reference to higher-order capacities is indeed required to make sense of both concepts, but also that such analyses need a more differentiated understanding of “wanting to want” than has hitherto been proposed. Central for autonomy is the instantiation of four types of optative relationship by an accountable agent under conditions of rationality. Valuing requires the disposition to instantiate only one of the relevant structures. Clarity on this allows an analysis of the precise relationships between the two phenomena     

Conceptual implicit memory and environmental context

Changes in environmental context between encoding and retrieval often affect explicit memory but research on implicit memory is equivocal. One proposal is that conceptual but not perceptual priming is influenced by context manipulations. However, findings with conceptual priming may be compromised by explicit contamination. The present study examined the effects of environmental context on conceptual explicit (category-cued recall) and implicit memory (category production). Explicit recall was reduced by context change. The implicit test results depended on test awareness (assessed with a post-test questionnaire). Among test-unaware participants, priming was equivalent for same-context and different-context groups, whereas for the test-aware, the same-context group produced more priming. Thus, when explicit contamination is controlled, changes in environmental context do not impair conceptual priming. Context dependency appears to be a general difference between implicit and explicit memory rather than a difference between conceptual and perceptual implicit memory. Finally, measures of mood indicated no changes in affect across contexts, arguing against mood mediation for the context effects in explicit recall.     

Can a mind have two time lines? Exploring space-time mapping in Mandarin and English speakers

Spatial representations of time are a ubiquitous feature of human cognition. Nevertheless, interesting sociolinguistic variations exist with respect to where in space people locate temporal constructs. For instance, while in English time metaphorically flows horizontally, in Mandarin an additional vertical dimension is employed. Noting that the bilingual mind can flexibly accommodate multiple representations, the present work explored whether Mandarin–English bilinguals possess two mental time lines. Across two experiments, we demonstrated that Mandarin–English bilinguals do indeed employ both horizontal and vertical representations of time. Importantly, subtle variations to cultural context were seen to shape how these time lines were deployed.