Deindividuation,anonymity, and violence: findings from Northern Ireland

The author examined the relation between anonymity and aggression in violent interpersonal assaults that occurred in Northern Ireland. Of the 500 violent attacks that the author studied, 206 were carried out by offenders who wore disguises to mask their identities. The findings revealed that significant positive relationships existed between the use of disguises and several measures of aggression. Disguised offenders inflicted more serious physical injuries, attacked more people at the scene, engaged in more acts of vandalism, and were more likely to threaten victims after the attacks. The author discussed these results within the framework of deindividuation theory.     

Time Reading in Middle and Secondary School Students: The Influence of Basic-Numerical Abilities

Abstract

Time reading skills are central for the management of personal and professional life. However, little is known about the differential influence of basic numerical abilities on analog and digital time reading in general and in middle and secondary school students in particular. The present study investigated the influence of basic numerical skills separately for analog and digital time reading in N?=?709 students from 5th to 8th grade. The present findings suggest that the development of time reading skills is not completed by the end of primary school. Results indicated that aspects of magnitude manipulation and arithmetic fact knowledge predicted analog time reading significantly over and above the influence of age. Furthermore, results showed that spatial representations of number magnitude, magnitude manipulation, arithmetic fact knowledge, and conceptual knowledge were significant predictors of digital time reading beyond general cognitive ability and sex. To the best of our knowledge, the present study is the first to show differential effects of basic numerical abilities on analog and digital time reading skills in middle and secondary school students. As time readings skills are crucial for everyday life, these results are highly relevant to better understand basic numerical processes underlying time reading.     

Effect of cognitive bias modification-memory on depressive symptoms and autobiographical memory bias: two independent studies in high-ruminating and dysphoric samples

Memory bias is a risk factor for depression. In two independent studies, the efficacy of one CBM-Memory session on negative memory bias and depressive symptoms was tested in vulnerable samples. We compared positive to neutral (control) CBM-Memory trainings in highly-ruminating individuals (N?=?101) and individuals with elevated depressive symptoms (N?=?100). In both studies, participants studied positive, neutral, and negative Swahili words paired with their translations. In five study–test blocks, they were then prompted to retrieve either only the positive or neutral translations. Immediately following the training and one week later, we tested cued recall of all translations and autobiographical memory bias; and also measured mood, depressive symptoms, and rumination. Retrieval practice resulted in training-congruent recall both immediately after and one week after the training. Overall, there was no differential decrease in symptoms or difference in autobiographical memory bias between the training conditions. In the dysphoric but not in the high-ruminating sample, the positive training resulted in positive autobiographical bias only in dysphoric individuals with positive pre-existing bias.

We conclude that one session of positive retrieval-based CBM-Memory may not be enough to yield symptom change and affect autobiographical memory bias in vulnerable individuals.     

Differences in personality characteristics between body-modified and non-modified individuals: associations with individual personality traits and their possible evolutionary implications

After a long history of negative stigmatisation, the practices of tattooing and body piercing have become fashionable in the last decade. Today, 10% of the population in modern western societies have some form of body modification. The aim of this study was to quantify the demographic and personality traits of tattooed and pierced individuals and to compare them with a control group of individuals without body modifications. These comparisons are based on questionnaires completed by 359 individuals that investigate the details of body modification, and which incorporate five personality scales. We describe several sex differences in ornament style and location. We found no relevant differences between modified and non-modified individuals in relation to demographic variables. This indicates that some of the traditional attitudes towards tattoos and piercings appear to be outdated. However, we found striking differences in personality traits which suggest that body-modified individuals are greater sensation seekers and follow a more unrestricted mating strategy than their non-modified contemporaries. We discuss these differences in light of a potential signalling function of tattoos and piercings in the mating context. Copyright © 2007 John Wiley & Sons, Ltd.     

The Köhler Group Motivation Gain: How to Motivate the ‘Weak Links’ in a Group

A recurring question of successful group work is how to maintain high task motivation of the individual members. This paper reviews research on one well documented group motivation gain phenomenon, where group members are more highly motivated than comparable individual performers – the Köhler motivation gain effect. The basic effect is attributed to two psychological mechanisms, one involving upward social comparisons and a second involving the indispensability of group members’ efforts. In addition to summarizing research on the discovery and causes of the basic effect, this review identifies probable moderators of each contributing causal mechanism. Moreover, promising topics for future research as well as implications for the application of the Köhler effect in real group work are discussed.