ADHD Symptoms in Post-Institutionalized Children Are Partially Mediated by Altered Frontal EEG Asymmetry

Individual differences in the propensity for left versus right frontal electroencephalogram (EEG) asymmetry may underlie differences in approach/withdrawal tendencies and mental health deficits. Growing evidence suggests that early life adversity may shape brain development and contribute to the emergence of mental health problems. The present study examined frontal EEG asymmetry (FEA) following the transition to family care in children adopted internationally from institutional care settings between 15 and 36 months of age (N = 82; 46 female, 36 male). Two comparison groups were included: an international adoption control consisting of children adopted from foster care with little to no institutional deprivation (N = 45; 17 female, 28 male) and a post-adoption condition control consisting of children reared in birth families of the same education and income as the adoptive families (N = 48; 23 female, 25 male). Consistent with evidence of greater approach and impulsivity-related behavior problems in post-institutionalized (PI) children, PI status was associated with greater left FEA than found in the other two groups. In addition, left FEA served as a mediator between institutionalization and age 5 ADHD symptoms for girls. Age at adoption and other preadoption factors were examined with results suggesting that earlier adoption into a supportive family resulted in a more typical pattern of brain functioning. Findings support the idea that the capacity of brain activity to evidence typical functioning following perturbation may differ in relation to the timing of intervention and suggest that the earlier the intervention of adoption, the better.     

Similarities and differences in contingency experiences of 3-month-olds across sociocultural contexts

In this study we analyzed similarities and differences in the contingency experiences of 159 three-month-olds from 6 sociocultural contexts. Across contexts, caretakers responded with similar overall contingency levels, vocalizations provided the dominant response as well as the most salient signal, and there was a relative signal-response correspondence. With two exceptions, infants in all samples most often got responses addressing their sense of hearing, followed by the sense of touch and then sight. In response to nondistress vocalizations, infants from independent contexts (Berlin, Los Angeles) experienced more contingent responses addressing their sense of sight than infants from autonomous-related (Beijing, Delhi, urban Nso from Cameroon) or interdependent contexts (rural Nso). Rural Nso infants experienced more contingent responses addressing their sense of touch than infants from all other but the Los Angeles sample. These results support the interpretation of contingent responsiveness as a part of the intuitive parenting program that manifests differentially depending on culture-specific emphases on distal and proximal caretaking.     

Categorizing at the group‐level in response to intragroup social comparisons: a self‐categorization theory integration of self‐evaluation and social identity motives

Two experiments examined how people respond to upward social comparisons in terms of the extent to which they categorize the self and the source of comparison within the same social group. Self‐evaluation maintenance theory (SEM) suggests that upward ingroup comparisons can lead to the rejection of a shared categorization, because shared categorization makes the comparison more meaningful and threatening. In contrast, social identity theory (SIT) suggests that upward ingroup comparisons can lead to the acceptance of shared categorization because a high‐performing ingroup member enhances the ingroup identity. We attempted to resolve these differing predictions using self‐categorization theory, arguing that SEM applies to contexts that make salient one's personal identity, and SIT applies to contexts that make collective identity salient. Consistent with this perspective, the level of identity activated in context moderated the effect of an upward ingroup comparison on the acceptance of shared social categorization. Copyright © 2006 John Wiley & Sons, Ltd.     

Internal control beliefs and reference frame concurrently impact early performance monitoring ERPs

This study investigated the impact of criterion-based vs. social reference frames on behavioural and neural correlates of performance monitoring while taking individual differences in control beliefs into account. We conducted two experiments administering a time estimation task in which feedback was either delivered pertaining to participants’ own performance (nonsocial/criterion-based reference) or to the performance of a reference group of previous participants (social reference). In Experiment 1, 34 male volunteers participated. To test generalizability of the observed results to both sexes/genders, we recruited 36 female volunteers for Experiment 2. P2 and P300 amplitudes were generally larger in social than in nonsocial reference trials in the male participants of Experiment 1. ΔFRN amplitudes were larger for social compared to non-social reference trials in Experiment 1. No effects of reference frame were found in the female sample of Experiment 2. Rather, P2 and ΔFRN effects showed opposing patterns for nonsocial versus social reference frames. However, stronger internal control beliefs were accompanied by larger FRN amplitudes of negative social reference trials in both samples, suggesting generalizable effects independent of sex/gender. Enhanced P2 and ΔFRN amplitudes for social versus nonsocial reference trials suggest enhanced attentional capture and higher saliency of socially framed feedback in male participants only. In both sexes/genders, however, the social reference frame possibly challenges internal control beliefs and by this enhances performance monitoring. Our results demonstrate the complex interplay of trait variables and reference frames during performance monitoring influencing our daily lives-reference frames are omnipresent in education and one’s working environment.     

Feeling Hopeful Inspires Support for Social Change

Hope is an emotion that has been implicated in social change efforts, yet little research has examined whether feeling hopeful actually motivates support for social change. Study 1 (N = 274) confirmed that hope is associated with greater support for social change in two countries with different political contexts. Study 2 (N = 165) revealed that hope predicts support for social change over and above other emotions often investigated in collective action research. Study 3 (N = 100) replicated this finding using a hope scale and showed the effect occurs independent of positive mood. Study 4 (N = 58) demonstrated experimentally that hope motivates support for social change. In all four studies, the effect of hope was mediated by perceived efficacy to achieve social equality. This research confirms the motivating potential of hope and illustrates the power of this emotion in generating social change.     

Social inferences concerning male and female homeowners who use a gun to shoot an intruder

Two experiments were performed to test the hypothesis that gender stereotypes influence social inferences about homeowners who use a gun to shoot an intruder. It was predicted that homeowners who violate stereotypical norms would be perceived more negatively, and would be perceived as more responsible for the consequences of their weapon use than would homeowners of both genders who represent stereotype-consistency. The data from the first experiment provided some support for this notion. Male homeowners who shot incompetently were perceived more negatively than were men who shot the intruder with competence. The opposite trend was observed for female homeowners. The second experiment tested a refinement of this hypothesis and revealed how attitudes toward guns, specifically degree of acceptance of the notion that guns provide their owners with protection, moderates the social judgments formed about homeowners who use weapons as a means of defending their property during a burglary, Persons for whom the event is inconsistent with their attitude-based expectancies blamed the stereotype-inconsistent homeowners more than the gender stereotype-consistent homeowners, particularly the skillful female shooters. Individuals with relatively negative attitudes toward guns, in contrast, tended to perceive the skillful female shooters more positively than the other homeowners. Perceptions of weapons users who find themselves and their actions scrutinized by the media and the court system may depend upon perceivers' pre-existing category expectations and attitudes. © 1993 Wiley-Liss, Inc.