Suppression of intrusive thoughts and working memory capacity in repressive coping

Previous research using a thought suppression paradigm found that repressors are more skilled in suppressing anxious autobiographical thoughts than low anxious, high anxious, and defensive high anxious people. Another line of research showed that individual differences in working memory capacity are related to the ability to intentionally suppress intrusive thoughts. This study aimed at combining these findings and sought to investigate whether repressors' superior ability to suppress intrusive thoughts is related to a larger working memory capacity. Results indicate that in a thought suppression paradigm, repressors report fewer intrusive thoughts for their most anxious experiences than participants in the 3 other subgroups. Furthermore, the superior ability of repressors to avoid intrusive thoughts can be explained largely by their higher working memory capacity.     

Hippocampal Mek/Erk signaling mediates extinction of contextual freezing behavior

Fear memories elicit multiple behavioral responses, encompassing avoidance, or behavioral inhibition in response to threatening contexts. Context-specific freezing, reflecting fear-induced behavioral inhibition, has been proposed as one of the main risks factors for the development of anxiety disorders. We attempted to define the key hippocampal mediators of extinction in a mouse model of context-dependent freezing. Nine-week-old male C57BL/6J mice were trained and tested for contextual fear conditioning and extinction. Freezing behavior scored by unbiased sampling, was used as an index of fear. Proteomic, immunoblot, and immunohistochemical approaches were employed to identify, verify, and analyze the alterations of the hippocampal extracellular signal-regulated kinases 1 and 2 (Erk-1/2). Targeted pharmacological inhibition of the Erk-1/2 activating kinase, the mitogen activated and extracellular signal-regulated kinase (Mek), served to establish the role of Mek/Erk signaling in extinction. When compared to acquisition, extinction of contextual freezing triggered a rapid activation of Erk-1/2 showing a distinctive time-course, nuclear localization, and subcellular isoform distribution. These differences suggested that the upstream regulation and downstream effects of this pathway might be specific for each process. Dorsohippocampal injections of the Mek inhibitors U0126 (0.5 microg/site) and PD98059 (1.5 microg/site) immediately after the nonreinforced trials prevented Erk-1/2 activation and significantly impaired extinction. This effect was dissociable from potential actions on memory retrieval or reconsolidation. On the basis of these findings, we propose that hippocampal Mek/Erk signaling might serve as one of the key mediators of contextual fear extinction.     

Draining the pond: why Singer’s defense of the duty to aid the world’s poor is self-defeating

Philosophical Studies - Peter Singer’s defense of the duty to aid the world’s poor by the pond analogy is self-defeating. It cannot be both true that you ought to save the drowning...     

The Reference Frame Effect: An Intergroup Perspective on Language Attitudes

Invoking self‐categorization and social identity theories, this study predicted that ingroups would be evaluated more favorably than outgroups, but that ingroup membership would change as a function of reference frame. Using the matched‐guise technique, moderate and broad American Southern English accented guises were presented to Californian listeners (N = 175). These were paired either with a Californian‐accented (interregional reference frame) or Punjabi‐accented English speaker (international reference frame). Listeners reported a stronger sense of connection with the Southern‐accented guises, perceived their accents as more similar, and upgraded them on solidarity traits when reference frame was international (i.e., ingroup categorization) rather than interregional (i.e., outgroup categorization). Reference frame had no effect on status ratings. Implications of this reference frame effect are discussed.     

Why should we try to think like scientists? Scientific reasoning and susceptibility to epistemically suspect beliefs and cognitive biases

This paper examines whether scientific reasoning skills predict people's susceptibility to epistemically suspect beliefs and cognitive biases. We used the recently developed Scientific Reasoning Scale (SRS) because it measures the ability to read and evaluate scientific evidence. Alongside the SRS, 317 participants aged 18–30 years completed measures of thinking dispositions and cognitive ability to ascertain whether the SRS contributes specifically to susceptibility to epistemically suspect beliefs and cognitive biases. Scientific reasoning correlated positively with dispositions towards analytic thinking and cognitive ability and negatively with dogmatism, epistemically suspect beliefs, and susceptibility to cognitive biases. Most importantly, it emerged as a significant predictor, contributing to susceptibility to both cognitive biases and epistemically suspect beliefs over and above the other cognitive predictors. These results provide the first empirical evidence that scientific reasoning ability is an important factor in protecting against epistemically suspect beliefs and in aiding better decision making among the non-scientific population.     

Doing one's duty: chronological age,felt autonomy,and subjective well‐being

Existential, psychosocial, and organismic theories propose that human beings tend towards greater autonomy over the lifespan, and that greater autonomy is associated with greater happiness. We tested these two ideas in the under‐studied domain of social duties by examining the associations between chronological age, felt autonomy while engaging in various social duties, and subjective well‐being (SWB). Study 1 found that older Americans felt more autonomous while voting, tipping, and paying taxes, Study 2 showed that American parents felt more autonomous in their work and citizenship roles compared with their own children, and Study 3 found that older Singaporeans felt more autonomous while obeying authorities, helping distant relatives, and staying politically informed. In all three studies, felt autonomy was also associated with higher SWB. It appears that older persons better internalize their social duties, to their own and societies' benefit. Copyright © 2004 John Wiley & Sons, Ltd.