Cerebral asymmetries in sleep-dependent processes of memory consolidation

Preference for previously seen, unfamiliar objects reflects a memory bias on affective judgment, known as the “mere exposure effect” (MEE). Here, we investigated the effect of time, post-exposure sleep, and the brain hemisphere solicited on preference generalization toward objects viewed in different perspectives. When presented in the right visual field (RVF), which promotes preferential processing in the left hemisphere, same and mirrored exemplars were preferred immediately after exposure. MEE generalized to much dissimilar views after three nights of sleep. Conversely, object presentation in the left visual field (LVF), promoting right hemisphere processing, elicited a MEE for same views immediately after exposure, then for mirror views after sleep. Most importantly, sleep deprivation during the first post-exposure night, although followed by two recovery nights, extinguished MEE for all views in the LVF but not in the RVF. Besides demonstrating that post-exposure time and sleep facilitate the generalization process by which we integrate various representations of an object, our results suggest that mostly in the right hemisphere, sleep may be mandatory to consolidate the memory bias underlying affective preference. These interhemispheric differences tentatively call for a reappraisal of the role of cerebral asymmetries in wake- and sleep-dependent processes of memory consolidation.     

Social Relations,Coping, and Psychological Distress Among Persons With HIV/AIDS1

The interrelationships among social support, coping style, and psychological distress were examined using longitudinal data from a sample of 212 persons with HIV/AIDS. Structural equation modeling analyses showed significant indirect effects on psychological distress for avoidant coping, feeling loved and understood, satisfaction with support, rejection by family members, discrimination because of HIV status, and number of AIDS symptoms. The inclusion of negative social interactions in the model is an important extension of the stress‐support literature. Feeling loved and understood mediated the relationship between social support and coping style choice. Results highlight the multidimensional nature of the processes that shape psychological outcomes in HIV disease. and suggest several potential points of intervention, including social‐support efforts that increase the sense that one matters to others, and interventions to assist patients to move from avoidant to active coping strategies.     

Explaining retrospective reports of symptoms in patients undergoing chemotherapy: anxiety, initial symptom experience, and posttreatment symptoms.

This study evaluated different perspectives on the relationship of trait anxiety to symptom report. Baseline trait anxiety was related to (a) initial symptoms reported 2 days after beginning chemotherapy, (b) posttreatment symptoms reported 2 days after cessation of medication, and (c) retrospective reports of initial symptoms (made concurrently with posttreatment reports). Associations were significant for vague psychophysiological symptoms but not for concrete visible symptoms. Path models indicated that the relationship of anxiety to retrospective report of vague symptoms was due to both enhanced encoding and facilitated recall of symptoms. Further analyses revealed, however, that this relationship reflects symptoms stability rather than anxiety-related differences in attention. Anxious and nonanxious patients appear to be equally accurate in their retrospective report of symptoms.     

Subjective, Autonomic, and Endocrine Reactivity during Social Stress in Children with Social Phobia

Reports of exaggerated anxiety and physiological hyperreactivity to social-evaluative situations are characteristic of childhood social phobia (SP). However, laboratory research on subjective, autonomic and endocrine functioning in childhood SP is scarce, inconsistent and limited by small sample sizes, limited breadth of measurements, and the use of non-standardized stressor tasks. We exposed 8–12-year-old children with DSM-IV SP (n = 41) and matched healthy control children (HC; n = 40) to the Trier Social Stress Test for Children (TSST-C) while measuring subjective anxiety, heart rate (HR) and salivary alpha-amylase (sAA) as well as salivary cortisol. The SP children showed heightened reactivity to the TSST-C on subjective anxiety compared to the HC children but not a heightened reactivity in HR, sAA or cortisol. However, the SP children showed chronically elevated HR levels throughout the whole laboratory session. Whereas subjective anxiety seems to respond specifically to social-evaluative stress in childhood SP, HR levels may be chronically elevated suggesting a more generalized autonomic hyperreactivity.     

Teacher Burnout in Hong Kong and Germany: A Cross-Cultural Validation of the Maslach Burnout Inventory

Teacher burnout is a world-wide phenomenon that draws the attention of educational psychologists and stimulates efforts in construct elaboration and measurement. Emotional exhaustion, depersonalization (cynicism), and lack of personal accomplishments are three dimensions that constitute the burnout syndrome. Levels of this burnout syndrome were compared among 542 German and Chinese teachers. It turned out that there were only minor differences between the Germans and the Chinese, but major differences between those two groups and the U.S. American normative data. Moreover, stress resource factors were measured, namely perceived self-efficacy and proactive attitude. Their negative intercorrelations with burnout supported the validity of the burnout measure, although the associations were much closer in the German subsample. An attempt to replicate the American three-factorial structure of the burnout construct failed in both subsamples, which is in line with previous evidence and calls for a revision of the original measure.     

Multidimensionality of state and trait anxiety: A cross-cultural study comparing american,canadian, israeli and german young adults

Abstract

The psychometric adequacy of the Endler Multidimensional Anxiety Scales (EMAS) was examined in samples of American, Canadian, Israeli, and West German male and female young adults. Also investigated was the generalizability of the interactional model of anxiety to a diverse set of cultural contexts. This interactional model distinguishes between multidimensional dimensions of state and trait anxiety. The EMAS was developed to both reliably and independently assess multidimensional state and trait anxiety. Three hundred and seventy-four American undergraduates, 292 Canadian undergraduates, 326 Israeli undergraduates, and 304 West German undergraduates completed the EMAS in a non-stressful situation. The EMAS subscales were found to be highly reliable scales in all four cultural groups. Consistent empirical support was found across cultural groups for both the distinction between state and trait anxiety and the multidimensionality of these two constructs. Significant gender and cultural differences were found across the various EMAS subscales. Women were more likely than men to report being anxious in social evaluation and physical danger situations. In comparison to the other 3 groups, the Israelis reported being less anxious in social evaluation and physical danger situations. Results are discussed in terms of cultural differences between Canada, the United States, West Germany and Israel.     

Mental Health in Children of Immigrants in Germany: The Role of Socio-Demographic and Immigration-Related Characteristics

Journal of Child and Family Studies - Over the last decades, the number of immigrants in Germany has been rising steadily. One result of this is that currently, around 40% of children in the...     

Flux-driven nucleation at interfaces during reactive diffusion

Nucleation of intermetallic compounds and of voids at interfaces during reactive diffusion is treated with account of influence of the flux divergence in the nucleation regions of the real space as an additional term for drift in the size space (in Fokker–Planck equation for nucleation). Such approach enables the construction of effective Gibbs nucleation barrier which may (in the broad region of parameters) increase to infinity meaning the full suppression of nucleation, or, by the contrast, decrease assisting the nucleation. The introduced effective nucleation barriers depend on kinetic factors – on the ratio of diffusivities in nucleating and in neighboring phases. Thus, the competition of stable and metastable phases is reconsidered, as well as nucleation of Kirkendall/Frenkel voids at the interfaces.     

The effect of cognitive load on faking interrogative suggestibility on the Gudjonsson Suggestibility Scale

In the light of recent studies into the impact of cognitive load on detecting deception, the impact of cognitive load on faking on the Gudjonsson Suggestibility Scale (GSS) was investigated. Eighty undergraduate students participated in the study, and were randomly assigned to one of four conditions resulting from a combination of the factors: instruction type (genuine or instructed faking, see Hansen, Smeets, & Jelicic, 2009) and concurrent task (yes or no). Findings show that instructed fakers, not performing a concurrent task, score significantly higher on yield 1 in comparison to genuine interviewees. This is in-line with previous studies into faking on the GSS. However, instructed fakers, performing a concurrent task, achieved significantly lower yield 1 scores than instructed fakers not performing a concurrent task. Genuine (non fakers) showed a different response to increased cognitive load during the dual-task paradigm. This study suggests that increasing cognitive load may potentially indicate (and preclude) faking attempts on the yield dimension of the Gudjonsson Suggestibility Scale.