Integrating biological and social processes in relation to early-onset persistent aggression in boys and girls

This study examined the relationship between biological and social risk factors and aggressive behavior patterns in an Australian high-risk sample of 370 adolescents. Perinatal, temperamental, familial, sociodemographic, and behavioral data were collected during interviews completed during pregnancy. immediately postpartum, and when the children were 6 months old and 5, 14, and 15 years old. Youths were given tests of verbal and neuropsychological functioning at the age 5 and age 15 follow-ups. Youths were divided into early-onset persistent aggression, adolescent-onset aggression, and nonaggressive behavior groups. Results revealed that the interaction of biological and social risk factors was significantly related to early-onset persistent aggression. Gender and developmental phase of measurement moderated the relationship between biosocial risks and the outcomes of early-onset persistent aggression and adolescent-onset aggression.     

Functional analysis and treatment of self-injurious behavior in young children a summary of 30 cases

The assessment and treatment of self-injurious behavior (SIB) has received much attention in the literature; however, few studies have focused on early intervention for this behavior. In the current study, functional analyses with developmentally appropriate modifications were conducted in an outpatient clinic with 30 children (aged 10 months to 4 years 11 months) to assess SIB and problem behavior in its early stages. The reported mean age of SIB onset was 17 months, and head banging was the most prevalent topography. Functional analyses identified sources of reinforcement for SIB in 62.1% of cases; with the inclusion of all forms of problem behavior, sources of reinforcement were identified for 87.5% of cases. Function-based treatments were developed for 24 cases, with functional communication training prescribed most often (70.8% of cases). Implications of these findings for the development of early intervention programs for SIB are discussed.     

Strategies of control,aggression, and morality in preschoolers: an evolutionary perspective

Moral reasoning, moral affect, social problem solving skills, and social preferences were assessed in 163 ethnically mixed preschoolers (2.86-5.95 years). Participants were rated by their teachers on prosocial and coercive strategies of control, success at resource control, and aggression (overt and relational). Based on their employment of coercive and prosocial strategies of resource control, the children were categorized as bistrategic controllers, coercive controllers, prosocial controllers, noncontrollers, or typicals. Teacher-rated relational aggression was positively associated with moral maturity in girls. Bistrategic controllers, although aggressive, were morally mature and preferred play partners by their peers. The results are discussed in terms of hypotheses that arise from evolutionary theory which suggests that highly effective resource controllers would be simultaneously aggressive and yet well aware of moral norms. The findings are contrasted with alternative hypotheses that might arise variously from traditional and prevailing approaches.     

Perceived control and distress following sexual assault: a longitudinal test of a new model

Longitudinal data were collected from female sexual assault survivors (N = 171) at 4 points postassault. Consistent with the predictions of the temporal model (P. Frazier, M. Berman, & J. Steward, 2002), past, present, and future control were differentially related to posttrauma distress. Both personal past (behavioral self-blame) and vicarious past (rapist blame) control were associated with higher distress levels. In addition, the belief that future assaults are less likely was more strongly associated with lower distress levels than was future control. Present control (i.e., control over the recovery process) was most adaptive. Hierarchical linear modeling analyses revealed that changes in perceived control were associated with changes in distress after linear change in distress over time was accounted for.     

Developments in long-term explicit memory late in the first year of life: behavioral and electrophysiological indices

Coincident with developments in the temporal-cortical explicit memory network, long-term recall abilities are newly emergent late in the first year of human life. We recorded event-related potentials (ERPs) in 9-month-olds as an index of the integrity of the neural substrate underlying a task thought to reflect explicit memory, namely, deferred imitation. ERP measures of recognition memory 1 week after unique laboratory experiences predicted whether and how much infants recalled of the experiences 1 month later. The findings further imply that memory storage and consolidation processes are a major source of variability in long-term recall memory late in the first year of life.     

Inhibition and working memory: effect of acute sleep deprivation on a random letter generation task]

The literature contains inconsistent data on the effects of acute sleep deprivation on the superior cognitive functions. The primary purpose of this study is to determine the effectiveness of inhibition, one of the functions of the working memory executive centre (EC), over an extended, 36-hour waking period. Inhibition is a cognitive mechanism whereby individuals ignore non-relevant information recorded in their working memory. We also tested the effects of a 36-hour period of acute sleep deprivation on simple reaction time. Twelve young, healthy volunteers (M = 21.5 years, sigma = 2.3) performed a random generation task involving letters and a simple reaction time psychomotor test over four sessions held at 10-hour intervals. Each participant was assigned a "constant routine." Participants were kept awake in a prone position within a room whose environment was held strictly constant (light, noise, temperature, meals, etc.). This control procedure provided assurance that any variation in participant performance was solely caused by sleep deprivation. The random generation task, nearly two minutes in length, consisted in verbally producing a sequence of 100 letters in a random fashion (i.e. by inhibiting, for example, alphabetical order) and by keeping to a set rhythm. Our assumption was that capacity for inhibition diminished as the number of hours of sleep deprivation increased. The simple reaction test, 10 minutes in length, involved pressing a button as swiftly as possible to cause a black square to disappear from a screen. In this case our assumption was that acute sleep deprivation alters simple reaction time. Analysis of variance (ANOVA) through repeated measures using the "sessions" factor as an intra-subject variable showed no significant changes in randomization indices of the random generation task, contrary to analysis of average simple reaction times. Participants' reaction times deteriorated over the first two minutes of the test during the night they were deprived of sleep. It would seem that the contradictory results of previous studies of the effects of acute sleep deprivation on the inhibition function would be due to errors in factor identification. In conclusion, the inhibition function, as measured during the performance of a brief task, seems to remain intact during an extended, 36-hour waking period. Simple reaction time assessed by means of a brief psychomotor test is affected during a night of sleep deprivation. The working-memory inhibition executive function shows greater resistance to acute sleep deprivation than does psychomotor reaction time for the performance of short tasks.     

Faith Development in the Lives of HIV-Positive Adults

Studies of religious faith consistently document the important role of religion in the lives of adults. Investigations of adult religious faith also suggest that a life crisis can stimulate faith development. However, these earlier studies do not explain how a life-threatening crisis changes adult religious faith. This study examines the impact of an HIV-positive diagnosis on adult religious faith development. Interviews were conducted with 18 HIV-positive men and women under 45 years of age. The researchers found that an HIV-positive diagnosis affects faith development in these ways: the perspective of faith shifts from a religious to a spiritual orientation for which the participants feel a stronger sense of ownership; the concept of God changes from an authoritarian to an empowering figure, and views of the self are transformed to include others.     

Neural Recruitment and CognitiveAging: Two Hemispheres Are Better Than One, Especially as You Age

Several neuroimaging studies have reported that older adults show weaker activations in some brain areas together with stronger activations in other areas, compared with younger adults performing the same task. This pattern may reflect neural recruitment that compensates for age-related neural declines. The recruitment hypothesis was tested in a visual laterality study that investigated age differences in the efficiency of bihemispheric processing. Letter-matching tasks of varying complexity were performed under two conditions: (a) matching letters projected to the same visual field (hemisphere) and (b) matching letters projected to opposite visual fields (hemispheres). As predicted by the recruitment hypothesis, older adults generally performed better in the bilateral than unilateral condition, whereas younger adults showed this pattern onlyfor the most complex task. We discuss the relation between these results and neuroimaging evidence for recruitment, and the relevance of the present bihemispheric advantage to other evidence for age-related changes in interhemispheric transfer.