Predictive validity of the theory of planned behaviour: the role of questionnaire format and social desirability

The present study was designed to assess the predictive validity of a theory of planned behaviour extended to include self‐identity, in the context of health‐related food choice. Following criticism of the use of questionnaires in social cognitive research, the impact of questionnaire format (random vs structured) and social desirability on questionnaire responses was assessed. Findings indicated that intention was the principal determinant of food choice; attitude, subjective norm and self‐identity were independently predictive of intention. There was only weak evidence to suggest effects of social desirability or questionnaire format on component relationships. The present study indicates that the impact of questionnaire format and social desirability on models such as the theory of planned behaviour is minimal, and that such models are robust predictors of food choice. Copyright © 1999 John Wiley & Sons, Ltd.     

Nimodipine alters acquisition of a visual discrimination task in chicks

Chicks 5 days old received intraperitoneal injections of nimodipine 30 min before training on either a visual discrimination task (0, 0.5, 1.0, or 5.0 mg/kg) or a test of separation-induced distress vocalizations (0, 0.5, or 2.5 mg/kg). Chicks receiving 1.0 mg/kg nimodipine made significantly fewer visual discrimination errors than vehicle controls by trials 41-60, but did not differ from controls 24 h later. Chicks in the 5 mg/kg group made significantly more errors when compared to controls both during acquisition of the task and during retention. Nimodipine did not alter separation-induced distress vocalizations at any of the doses tested, suggesting that nimodipine's effects on learning cannot be attributed to a reduction in separation distress. These data indicate that nimodipine's facilitation of learning in young subjects is dose dependent, but nimodipine failed to enhance retention.     

Extended contact through cross‐group romantic relationships

Cross‐group romantic relationships are an extremely intimate and often maligned form of intergroup contact. Yet, according to intergroup contact theory, these relationships have the potential to improve the intergroup attitudes of others via extended contact. This study combines the interpersonal and intergroup literatures to examine the outcomes associated with knowing a partner in a cross‐group romantic relationship. Results suggest that cross‐group romantic partners encounter greater disapproval toward their relationships than same‐group partners and, as a result, their relationships are perceived more negatively. Nevertheless, extended contact with cross‐group partners, controlling for participants' cross‐group friendships and romantic relationships, predicts more positive attitudes toward cross‐group dating and positive intergroup attitudes in general, mediated by perceived ingroup norms toward cross‐group relationships.     

Eyewitness Evidence Obtained with the Self‐Administered Interview© Is Unaffected by Stress

The Self‐Administered Interview© (SAI) serves to elicit eyewitness statements directly after the crime. Witnesses could still experience stress then. Because stress during retrieval produces memory‐impairing effects, this study sought to compare the SAI with free recall under stress. An interaction between stress and interview was expected such that the SAI would elicit more comprehensive accounts than free recall in the control, but not in the stress group. One hundred and twenty‐seven participants underwent a stress or control task. They witnessed a live staged crime and completed an SAI or a free recall. The SAI elicited a higher number of correct verifiable event details and a higher number of correct and incorrect perpetrator details than free recall. Accuracy rates were unaffected. Unexpectedly, despite causing moderate stress‐induced cortisol elevations, stress exposure did not influence memory performance and did not interact with interview type. Hence, the SAI can safely be used, when witnesses are moderately stressed.Copyright © 2015 John Wiley & Sons, Ltd.     

The role of appraisal in dysphoric affect reactivity to positive laboratory films and daily life events in depression

Hedonic deficits are linked to protracted dysphoric affect (DA) in depression, a disorder characterised by emotion context insensitivity (ECI). Recent findings from daily life studies contradict the ECI view. This study longitudinally investigated DA across laboratory and daily life contexts and the conditions associated with discrepancies in DA reactivity. Thirty-three healthy controls and 41 adults with major depressive disorder (MDD) provided responses to neutral and positive (a) films viewed in the laboratory and (b) daily events recorded over the course of three days using ecological momentary assessment (EMA) methodology. The current study reports on participants’ appraisals of films and events and their subsequent DA, both rated individually after each task and daily event. Despite large group similarities in appraisals of the positive film and life events, MDDs appraised the neutral film and neutral life events as less important (film: d?=?.58; event: η²?=?.07) and less pleasant (film: d?=?.56; event: η²?=?.18) relative to controls. While MDDs reported higher DA both in the laboratory and in daily life, they experienced larger decreases in DA during positive life events (B?=??.77, SE?=?.28, t(73)?=??2.70, p?=?.009), but not in response to the positive film relative to controls. Results indicate that higher pleasantness appraisals in daily life predicted larger decreases in DA among MDDs than controls (B?=??.24, SE?=?.06, t(73)?=??4.10, p?B?=?1.28, SE?=?.46, t(73)?=?2.77, p?=?.006). The implications of valence and relevance of context for DA reactivity and mood repair are discussed.     

‘Baby brain’ in pregnancy: A review of social psychological explanations and future research directions

The colloquial concept of ‘baby brain’ suggests that throughout pregnancy and into the immediate postpartum period, women have reduced cognitive abilities and are more distracted, forgetful, and incompetent. To date, a plethora of cognitive and neuropsychological research testing the cognitive functioning of pregnant women relative to other groups has yielded inconsistent and unclear findings. However, there is a notable lack of literature that adopts a social psychological perspective, critically assessing the contribution of social context to the ‘baby brain’ phenomenon. In this paper, we review the current ‘baby brain’ literature and outline two potential social perspectives that provide insights into this research area: stereotype threat theory and objectification theory. We argue that inconsistencies in the ‘baby brain’ cognitive literature may be impacted by under-explored social phenomena, which may result from activation of stereotypes or objectifying cues throughout pregnancy and into early new motherhood. We end with suggestions for future social and personality psychological research directions in the area of ‘baby brain’.