Consequences of Child Exposure to War and Terrorism

Acts of war and terrorism are increasingly prevalent in contemporary society. Throughout history, weaponry has become more efficient, accurate, and powerful, resulting in more devastation and loss of human life. Children are often overlooked as victims of such violence. Around the world, children are exposed to violence in multiple forms, frequently developing traumatic stress reactions. Such reactions are best understood within the context of social-emotional and cognitive development, as children respond differently to the stress of violence depending on their developmental level. Furthermore, the violence of war and terrorism often results in a multitiered cascade of negative life events including loss of loved ones, displacement, lack of educational structure, and drastic changes in daily routine and community values. These numerous losses, challenges, and stresses affect children's brains, minds, and bodies in an orchestrated whole-organism response. This paper describes these effects, synthesizing the current state of research on childhood traumatic stress reactions from the fields of neuroscience, clinical psychology, and pediatric diagnostic epidemiology.     

Motor sequence learning and reading ability: is poor reading associated with sequencing deficits?

Although it is widely assumed that children with learning disabilities have "sequencing problems," these have not been well specified. A non-verbal serial reaction time (SRT) paradigm was used to evaluate motor sequence learning in 422 children between ages 7 and 11 in relation to reading, cognitive ability level, and attention problems. The children demonstrated the response profile typically associated with motor sequence learning, but the component of the profile indicative of implicit sequence learning was not reliably associated with any of the predictors. Cognitive ability predicted overall response time; cognitive ability, reading, and attention problems each predicted overall accuracy. Explicit learning was predicted by cognitive ability, but not by reading or attention problems. Thus, we found no evidence that poor reading is preferentially associated with a domain general deficit in sequential learning.     

Cognitive correlates of medial temporal lobe development across adolescence: a magnetic resonance imaging study

Adolescent development involves progressive changes in brain structure and cognitive function, but relatively few studies have documented the cognitive correlates of differences in structural brain volumes in this age group. We examined the relations among age, cognitive processing, and mesial temporal lobe volume in 37 children and adolescents. Participants completed a brief cognitive assessment battery and underwent volumetric structural magnetic resonance imaging. For the sample as a whole, amygdala volume correlated positively with age, and larger volumes of both the left and right amygdala were significantly associated with better performance on several cognitive tasks assessing academic skills and acquired knowledge in long-term memory. In contrast, hippocampal volumes did not correlate with adolescents' age and were less frequently correlated with cognitive performance. Amygdala volumes were most predictive of cognitive abilities in boys, whereas for girls, the volume of the hippocampus contributed more frequently to the prediction of cognitive abilities. These data suggest that measurable differences in mesial temporal volumes during adolescence are reliably associated with long-term cognitive abilities, particularly academic skills and the acquisition of intellectual knowledge, and that these relationships may differ as a function of the sex of the child.     

A mind to blame: new views on involuntary acts

This article examines the legal implications linked to recent scientific research on human consciousness. The article contends that groundbreaking revelations about consciousness expose the frailties of the criminal law's traditional dual dichotomies of conscious versus unconscious thought processes and voluntary versus involuntary acts. These binary doctrines have no valid scientific foundation and clash with other key criminal law defenses, primarily insanity. As a result, courts may adjudicate like individuals very differently based upon their (often unclear) understanding of these doctrines and the science that underlies them. This article proposes a compromise approach by recommending that the criminal law's concept of voluntariness consist of three parts: (i) voluntary acts, (ii) involuntary acts, and (iii) semi-voluntary acts. The semi-voluntary acts category, which is new, incorporates modern ideas of consciousness and also advances the law. Using some actual criminal cases, this article applies this new three-part grouping and demonstrates how it enhances a more just outcome for defendants, victims, and society.     

Social preferences of developing guinea pigs (Cavia porcellus) from the preweaning to the periadolescent periods

Preference tests in a novel environment (Experiment 1) and unobtrusive observations in a specialized living environment (Experiment 2) examined the attractiveness of various classes of conspecifics for maturing guinea pigs (Cavia porcellus). It was found that (a). the young continued to remain near the mother well beyond weaning; (b). there was increased time spent with unrelated adult females, but not males, after weaning; (c). male and female offspring behaved similarly; and (d). littermates spent considerable time with each other. These results provide no evidence that guinea pigs approaching sexual maturity begin to associate preferentially with novel animals or potential breeding partners. Choices were largely predictable from earlier findings of the ability of various classes of conspecifics to reduce hypothalamic-pituitary-adrenal activity of the young.     

Category structure and created memories

Cued recall of categorized lists was used to examine effects of category structure on the creation of false memories. In three experiments, category members that had not been presented on studied categorized lists were nonetheless recalled by participants. Delaying the category cued recall test (Experiment 1) and priming category members that had been omitted from target lists (Experiment 3) increased the frequency of false recall. All three experiments showed that nonpresented category members that were higher in output dominance were more frequent intrusions. The typicality of category members, however, did not uniquely contribute to the predictability of false recall (or accurate recall) once the contribution of output dominance was taken into account, suggesting that item accessibility (related to output dominance) may be more instrumental than item distinctiveness (related to typicality) in causing certain types of false recall. The results show that created memories in category cued recall are strongly biased by prior category knowledge and can be predicted by the graded structure of categories, particularly in terms of the output dominance of category instances.     

Contribution of age, genes, and environment to the relationship between perceptual speed and cognitive ability

The aim of this study was to examine genetic influences on cognitive ability in adulthood in the context of the relationship between perceptual speed and cognitive aging. Quantitative genetic analysis of data from the Swedish Adoption/Twin Study of Aging allowed for estimation of the contribution of age, genetic, and environmental effects to the variance in a latent cognitive factor and to the covariance between the cognitive factor and perceptual speed. The sample included 292 pairs of monozygotic and dizygotic twins. both reared together and reared apart, ranging in age from 40 to 84 years. Analysis of components of total variance in the cognitive factor indicated that 90% of the age-related variance in the cognitive factor was shared with perceptual speed and 70% of the genetic variance in the cognitive factor was shared with perceptual speed. The correlation between the speed and cognitive factors was primarily genetically mediated.     

Localizing Localization: The Role of Working Memory in Auditory Localization

It is unclear from current accounts of working memory which, if any, of its components might be involved in our ability to specify the location of a sound source. A series of studies were performed to assess the degree of interference in localization of broadband noise, by a concurrent articulatory suppression (articulatory loop—Experiment 1), serial recall (phonological store and articulatory loop—Experiment 2), and Paced Visual Serial Addition Test (central executive—Experiment 3). No significant disruption of auditory localization was revealed by the first two experiments, ruling out a role for the phonological loop in auditory localization. In Experiment 3, a large degree of error was exhibited in localization, when performed concurrently with the addition task, indicating a requirement for central resources. This suggestion is confirmed by comparison of localization performance across all three studies, which demonstrates a clear deterioration in performance as the demand of concurrent tasks on central resources increases. Finally, concurrent localization was shown to disrupt the primacy portion of the serial position curve, as well as performance on the Paced Visual Serial Addition Test.     

Attachment Style,Assertive Communication,and Safer-Sex Behavior1

This research tested the proposition that the effect of attachment security on safer-sex practice may be mediated by communication patterns. One hundred eighty-five undergraduate students completed questionnaire measures of attachment, assertiveness, and attitudes to communication about AIDS. Eight weeks later, they reported on their practice of safer sex in the period since the first testing session. Hierarchical regressions showed that at Step I, anxiety about relationships (a measure of insecure attachment) was associated with less safer-sex practice, for all outcome measures. Attitudes to communication about AIDS added to the prediction of general reports of safer-sex practice: in line with the mediational model, anxiety about relationships became unimportant as a predictor when communication variables were included. Communication variables failed to add to the prediction of safer sex on the most recent encounter, and both anxiety about relationships and attitudes to communication about AIDS predicted condom use. Some gender differences in patterns of prediction were noted. The results are discussed in terms of attachment style and its links with the negotiation of sexual practice and relationship issues.     

INCREASING ENGAGEMENT IN DAILY ACTIVITIES BY OLDER ADULTS WITH DEMENTIA

This study analyzed the effects of nursing assistants' use of prompts and praise to increase the engagement of older adults with dementia in daily living activities. The multiple baseline design across morning and afternoon work shifts showed consistent increases in engagement by each of the 5 residents during the intervention. These results suggest that increasing prompts and praise by nursing assistants may, in turn, increase the rate of engagement of older adults with dementia.