Tell me more: Can a memory test reduce analogue traumatic intrusions?

Information processing theories of post-traumatic stress disorder (PTSD) state that intrusive images emerge due to a lack of integration of perceptual trauma representations in autobiographical memory. To test this hypothesis experimentally, participants were shown an aversive film to elicit intrusive images. After viewing, they received a recognition test for just one part of the film. The test contained neutrally formulated items to rehearse information from the film. Participants reported intrusive images for the film in an intrusion diary during one week after viewing. In line with expectations, the number of intrusive images decreased only for the part of the film for which the recognition test was given. Furthermore, deliberate cued-recall memory after one week was selectively enhanced for the film part that was in the recognition test a week before. The findings provide new evidence supporting information processing models of PTSD and have potential implications for early interventions after trauma.     

Psychometric analysis of the systemizing quotient (SQ) scale

The psychometric properties of the systemizing quotient (SQ) developed by Baron‐Cohen (2003) are investigated in three studies. Furthermore, we examine the notion that the ability to systemize should be independent of intelligence. In Studies 1 and 2, confirmatory factor analyses are used to examine the factor structure of the SQ. Study 3 examines the relationship between systemizing, mental rotation and intelligence. Studies 1 and 2 indicate that the SQ does not possess a unifactorial structure but is best considered as four related factors; Study 3 found that SQ was not related to intelligence, although mental rotation was. A four factor structure using fewer items was a better fit for the data than either the original version of the SQ or Wakabayashi et al.'s (2006) revised version. Overall these results support Baron‐Cohen's view that SQ is not related to intelligence. Although mental rotation is correlated to SQ, it is not the main determinant of SQ. The problems of self‐report measures are discussed along with the difficulties related to measuring systemizing.     

Human and peoples' rights: social representations among Cameroonian students

Social representations of human and peoples' rights were studied among Cameroonian university students (N = 666) with a questionnaire based on the UN Declaration of Human Rights and the African Charter on Human and Peoples' Rights and Duties. The respondents were asked how important and how well realized they regarded the 39 human and peoples' rights to be. A 13-factor model provided the best fit with Cameroonian students' perceptions of human and peoples' rights. Taken as a whole, our results are in line with previous quantitative studies on human rights, confirming structural similarity but also country-specific variation in the aggregation of specific rights. Moreover, our data showed that Cameroonian students value human and peoples' rights highly (M = 6.18), whereas their fulfillment is not regarded as highly (M = 5.09). Same law for all, equality and freedom, and right to work and living were highly appreciated but lowly realized rights. Higher than average in importance and realization were right to education and self-fulfillment, right to marriage and property, peoples' social and political basic rights and right to life and safety. Low in importance and realization were peoples' right to their country's natural resources and independence, right to meetings, and right to express opinion. Women appreciated the rights more than men and thought of their rights as better realized compared to men. We suggest that when women say that their rights are better fulfilled than men do, it is in comparison with the older generation, who are still very dependent on men. Nowadays, thanks to education and urbanization, young women have wider choices or opportunities for marriage and jobs. Men may feel frustrated in the context of political liberalization because the freedoms are more theoretical than fulfilled; the economic crises and cultural changes have hindered their economic domination and their prerogatives.     

Doing gender differently—The interplay of strength of gender identification and content of gender identity in predicting women's endorsement of sexist beliefs

To explain differences in women's endorsement of sexist beliefs, we introduce the gender identity model (GIM). Based on social identity theory (SIT) and social role theory (SRT), we combine strength of gender identification and identity content and propose that different types of gender identity can be distinguished, which are predicted to relate to different levels of women's endorsement of sexist beliefs and engagement in collective action. Results of a correlational study and two experiments support the assumptions of the model: women reject Benevolent (BS), Hostile (HS), and Modern Sexisms (MS) and participate in collective action in particular when they are highly identified with the category women and have, at the same time, internalized progressive identity contents. In contrast, gender role preference has weaker or no effects on sexist beliefs and collective action when women are low identified with their gender in‐group. Copyright © 2008 John Wiley & Sons, Ltd.     

Combined functional and causal connectivity analyses of language networks in children: a feasibility study

Instead of assessing activation in distinct brain regions, approaches to investigating the networks underlying distinct brain functions have come into the focus of neuroscience research. Here, we provide a completely data-driven framework for assessing functional and causal connectivity in functional magnetic resonance imaging (fMRI) data, employing Granger's causality. We investigate the networks underlying story processing in 17 healthy children (8f, 9m, 10.4+/-2.8 years, 6.5-15.4 years). Extensive functional connectivity exists between brain regions, including some not detected in standard random effects analyses. Causal connectivity analyses demonstrate a clear dominance of left-sided language regions for both forward and backward interactions with other network nodes. We believe our approach to be useful in helping to assess language networks in the normal or pathological setting; it may also aid in providing better starting estimates for the more hypothesis-driven approaches like structural equation or dynamic causal modeling.     

Lifespan development of stimulus-response conflict cost: similarities and differences between maturation and senescence

Age gradient of the mechanism of stimulus-response conflict cost was investigated in a population-based representative sample of 291 individuals, covering the age range from 6 to 89 years. Stimulus-response conflict cost, indicated by the amount of additional processing time required when there is a conflict between stimulus and response options, follows a U-shaped function across the lifespan. Lifespan age gradient of conflict cost parallels closely those of processing fluctuation and fluid intelligence. Individuals at both ends of the lifespan displayed a greater amount of processing fluctuation and at the same time a larger amount of conflict cost and a lower level of fluid intelligence. After controlling for chronological age and baseline processing speed, conflict cost continues to correlate significantly with fluid intelligence in adulthood and old age and with processing fluctuation in old age. The relation between processing fluctuation and conflict cost in old age lends further support for the neuromodulation of neuronal noise theory of cognitive aging as well as for theories of dopaminergic modulation of conflict monitoring.     

Social influence on predictions of simulated stock prices

Herding in financial markets refers to that investors are influenced by others. This study addresses the importance of consistency for herding. It is suggested that, in financial markets perceptions of consistency are based on repeated observations over time. Consistency may then be perceived as the agreement across time between investors' predictions. In addition, consistency may be related to variance over time in each investor's predictions. In an experiment using a Multiple Cue Probability Learning paradigm, 96 undergraduates made multi‐trial predictions of future stock prices given information about the current price and the predictions made by five fictitious others. Consistency was varied between the others' predictions (correlation) and within the others' predictions (variance). The results showed that the predictions were significantly influenced by the others' predictions when these were correlated. No effect of variance was observed. Hence, participants were influenced by the others when they were in agreement, regardless of whether they varied their predictions over trials or not. Copyright © 2008 John Wiley & Sons, Ltd.