War exposure and post-traumatic stress as predictors of Portuguese colonial war veterans' physical health

The relationship between war exposure and post-traumatic stress disorder (PTSD) has been largely investigated but the impact of the combat experience on physical health has only recently merited attention. The authors investigated the relationship between war exposure and psychological and physical health among 350 Portuguese colonial war veterans. The role of current PTSD symptoms as a mediator of these relationships was also investigated. The results showed that 39% of the veterans met criteria for current PTSD diagnosis and psychological distress was present in half of the sample. Pain, fatigue, and sleep problems were the most reported physical symptoms and mental health and gastro-intestinal problems, the most reported illnesses. Combat exposure variables were significant predictors of current health. The results indicated that veterans with higher exposure to war trauma maintained higher current levels of psychological distress and presented more physical health problems and physical symptoms than those less exposed. Mediation analyses showed that current PTSD was a full mediator of the relationship between war exposure and physical health outcomes.     

Post-training disruption of Arc protein expression in the anterior cingulate cortex impairs long-term memory for inhibitory avoidance training

The activity-regulated-cytoskeletal-associated protein (Arc) has a well established role in memory consolidation and synaptic plasticity in the hippocampus and amygdala. However the role of Arc within the anterior cingulate cortex (ACC), an area of the brain involved in processing memory for pain, has yet to be examined. Here we sought to determine if Arc protein within neurons of the rat ACC is necessary for the consolidation of a single-trial, contextual inhibitory avoidance (IA) task. Immunohistochemistry and western blotting revealed an increase in Arc protein within the ACC following IA training in a shock-specific manner, suggesting that ACC Arc expression may play a critical role in the consolidation of the aversive task. To directly test this hypothesis, male Sprague-Dawley rats were trained on the IA task and given post-training intra-ACC infusions of Arc antisense oligodeoxynucleotides (ODNs), designed to suppress Arc translation, or control scrambled ODNs that do not suppress Arc translation. Memory retention was tested 48h after training. Arc antisense-induced disruption of Arc protein expression in the ACC impaired long-term memory for the IA task as compared to rats given intra-ACC infusions of the scrambled control ODNS, suggesting that Arc expression in the ACC is important for the consolidation of emotional memory. Results further indicate that knock down of Arc 6h after training impairs IA memory. This is consistent with time course findings indicating elevated Arc expression at 3 and 6h after IA training but not 12 or 48h. Taken together, these findings support the hypothesis that Arc expression in the ACC participates in synaptic plasticity that underlies long-term memory.     

Effects of role model deservingness on overcoming performance deficits induced by stereotype threat

Previous research has shown that exposure to successful role models can restore performance that had been impaired by stereotype threat, and that some role models are more effective than others. The present research examined the effects of role model deservingness on women's mathematics test performance after being placed under stereotype threat. In Experiment 1, a woman who attained success by herself (deserved) proved a more effective role model than an equally likable and successful woman whose success was handed to her (not deserved). In Experiment 2, women role models proved more effective at combating stereotype threat when their successes were attributable to internal‐stable (deserved) than external‐unstable (not deserved) causes, an effect that was partially mediated by reduction in extra‐task thinking. The results are seen as having implications for theories of stereotype threat and causal attribution. Copyright © 2010 John Wiley & Sons, Ltd.     

Recovering faces from memory: the distracting influence of external facial features

Recognition memory for unfamiliar faces is facilitated when contextual cues (e.g., head pose, background environment, hair and clothing) are consistent between study and test. By contrast, inconsistencies in external features, especially hair, promote errors in unfamiliar face-matching tasks. For the construction of facial composites, as carried out by witnesses and victims of crime, the role of external features (hair, ears, and neck) is less clear, although research does suggest their involvement. Here, over three experiments, we investigate the impact of external features for recovering facial memories using a modern, recognition-based composite system, EvoFIT. Participant-constructors inspected an unfamiliar target face and, one day later, repeatedly selected items from arrays of whole faces, with "breeding," to "evolve" a composite with EvoFIT; further participants (evaluators) named the resulting composites. In Experiment 1, the important internal-features (eyes, brows, nose, and mouth) were constructed more identifiably when the visual presence of external features was decreased by Gaussian blur during construction: higher blur yielded more identifiable internal-features. In Experiment 2, increasing the visible extent of external features (to match the target's) in the presented face-arrays also improved internal-features quality, although less so than when external features were masked throughout construction. Experiment 3 demonstrated that masking external-features promoted substantially more identifiable images than using the previous method of blurring external-features. Overall, the research indicates that external features are a distractive rather than a beneficial cue for face construction; the results also provide a much better method to construct composites, one that should dramatically increase identification of offenders.     

Separation anxiety and the inhibition of aggression in preschool children

The anxiety, aggression, and affiliation responses of 10 high- and 10 low-separation-anxious 3-year-old children were observed under a control and a frustrating condition to test the hypothesis that separation anxiety is associated with the inhibition of aggression. High-separation-anxious Ss manifested significantly less (p < .01) increased aggression to frustration than did low-separation-anxious Ss; there were no group differences in state anxiety arousal or affiliation responses. The results were discussed in terms of the concept of anxiety as a drive having both cue and response-enhancing functions.This study was funded by a college research grant from the New York State College of Human Ecology at Cornell University. Special thanks are due to James Cox, Lisa Fremont, and Sharon McNulty for their help in carrying out this study and to the staffs and children of the Ithaca preschool programs who made this research possible.     

Individual differences in preschool object play: The influences of anxiety proneness and peer affiliation

Individual differences in anxiety and peer affiliation were investigated as factors influencing variability of object play among preschoolers. Eighteen three-year-olds were divided into high- and low-anxious groups on the bases of separation anxiety and general anxiety scales. Their mature and immature object play, their peer affiliation, and their peer-watching behaviors were observed in preschools. Low-anxious children played more, showed more mature play, and watched peers less when they were alone; high-anxious children showed no play increases but watched peers more when alone. Separation anxiety scores predicted preschool differences more sensitively than general anxiety scores. It was theorized that separation anxiety related mechanisms hinder children's ability to fully profit from preschool experiences.     

Span of apprehension in hyperactive boys

The spans of apprehension of hyperactive and normal boys were compared with a forced-choice letter-recognition task developed by Estes (1965). This task provides an estimate of the span which is relatively insensitive to either memory or motivational influences. The span size was the same for both groups when visual noise was absent. In the presence of noise, span size for the hyperactive boys decreased. Moreover, as the number of noise letters increased, the reduction in span size observed for the hyperactive boys increased. It is argued that this increasing reduction in span size represents a true deficit in attention.