Large-scale brain systems in ADHD: beyond the prefrontal-striatal model

Attention-deficit/hyperactivity disorder (ADHD) has long been thought to reflect dysfunction of prefrontal-striatal circuitry, with involvement of other circuits largely ignored. Recent advances in systems neuroscience-based approaches to brain dysfunction have facilitated the development of models of ADHD pathophysiology that encompass a number of different large-scale resting-state networks. Here we review progress in delineating large-scale neural systems and illustrate their relevance to ADHD. We relate frontoparietal, dorsal attentional, motor, visual and default networks to the ADHD functional and structural literature. Insights emerging from mapping intrinsic brain connectivity networks provide a potentially mechanistic framework for an understanding of aspects of ADHD such as neuropsychological and behavioral inconsistency, and the possible role of primary visual cortex in attentional dysfunction in the disorder.     

STABILITY OF BIOLOGICAL FATHER PRESENCE AS A PROXY FOR FAMILY STABILITY: CROSS‐RACIAL ASSOCIATIONS WITH THE LONGITUDINAL DEVELOPMENT OF EMOTION REGULATION IN TODDLERHOOD

The current study, utilizing data from the National Early Head Start Research and Evaluation Project (Love et al., 2005) explored the relationship between biological father presence and emotion regulation over toddlerhood among children from low‐income families. Conceptualizing biological father presence as a proxy for family role development, results are interpreted from a role development theoretical perspective. The latent growth curve model was compared based on child ethnoracial status (African American, Caucasian, Hispanic) and child gender. Consistent biological father presence was associated with toddlers’ regulatory development across toddlerhood, and this relationship was most robust among Caucasian toddlers as compared to African American toddlers. Findings for Hispanic toddlers were not significantly different from those of Caucasian or African American families. Results bolster the literature on father presence and child outcomes. Analyses address consistency in father presence as a proxy for coherent role development and define a link between consistent father presence and children's regulatory development, demonstrating ethnoracial differences which are likely attributed to the social construction of family roles.     

How Does Anticipated Regret Influence Health and Safety Decisions? A Literature Review

Making important decisions about health and safety often involves contemplating the regret that may arise if a decision turns out badly. Does anticipated regret decrease risky behaviors and promote precautionary behaviors? The present article reviews the role of anticipated regret in health and safety decisions by outlining findings from the most commonly researched topics. In line with an extended theory of planned behavior, the review concludes that anticipated regret generally predicts behavioral intentions, and intentions in turn influence health and safety behavior. The review discusses methodological recommendations and implications for interventions, and identifies unanswered questions and directions for future research.     

PTSD, Depressive Symptoms, and Suicidal Ideation in African American Women: A Mediated Model

Although research has shown positive associations among post-traumatic stress disorder (PTSD), depressive symptoms, and suicidal ideation, the nature of these relations is unclear, especially in African American women. This study examined the associations among these comorbid psychological difficulties in a sample of 136 low-income, African American women. Specifically, the goal of this investigation was to ascertain if overall depressive symptoms, as well as both the cognitive-affective and somatic components of depression, mediated the PTSD-suicidal ideation link. Results from bootstrapping analyses revealed that overall depressive symptoms and the cognitive-affective components of depression, but not the somatic components, mediated the PTSD-suicidal ideation link.     

The impact of uncertainty and communal coping on mental health following natural disasters

Abstract

Feelings of uncertainty are a central feature of the disaster experience. Surprisingly, though, there is very little systematic quantitative research about the impact of uncertainty on disaster survivors. Moreover, communal coping has increasingly received attention as a potential buffer of the negative effects of stressors but that literature is also limited in its application to disasters. This investigation applies research in the domain of uncertainty, together with the Theoretical Model of Communal Coping to better understand the experience of a community exposed to three wildfires in a one year period. A random-digit dialing procedure was used to gather data from 402 individuals. Participants completed measures of mental health, uncertainty, and communal coping in the context of their experience with the most personally stressful of the three wildfires. All analyses were examined separately for those who were evacuated and those who were not. Results support the negative impact of uncertainty across both evacuated and nonevacuated sub-samples and show a strong buffering role for communal coping among those who evacuated. The implications of these findings for the understanding of wildfire survivors' experiences are noted and future directions are proposed.     

The Instructional Challenges of Student Plagiarism

The focus of this article is university teachers’ and students’ views of plagiarism, plagiarism detection, and the use of plagiarism detection software as learning support. The data were collected from teachers and students who participated in a pilot project to test plagiarism detection software at a major university in Finland. The data were analysed through factor analysis, T-tests and inductive content analysis. Three distinct reasons for plagiarism were identified: intentional, unintentional and contextual. The teachers did not utilise plagiarism detection to support student learning to any great extent. We discuss the pedagogical implications and suggest that the contextual reasons for plagiarism require focus primarily on study strategies, whereas the intentional reasons require profound discussion about attitudes and conceptions of good learning and university-level study habits.     

Self‐Reported Family Socioeconomic Status,the 5‐HTTLPR Genotype,and Delinquent Behavior in a Community‐Based Adolescent Population

Twin and adoption studies have demonstrated a significant contribution of both genetic and environmental factors to antisocial and delinquent behavior. Associations have been reported between the serotonin transporter (5‐HTT) and aggression, and between socioeconomic status (SES), aggression, and serotonergic functions of the brain. We aimed to investigate associations between the 5‐HTTLPR genotype and family SES in relation to delinquent behavior among adolescents. A total of 1,467 17‐ to 18‐year‐old students in the county of Västmanland, Sweden, anonymously completed a questionnaire and gave a saliva sample. Family SES had a U‐shaped relation to delinquency, where adolescents with low and high family SES were the most delinquent. There were curvilinear interactions between the 5‐HTTLPR genotype and family SES in relation to delinquency. Among individuals having high family SES, boys with the LL (homozygous for the long allele) or LS (heterozygous) genotypes and girls with the SS (homozygous for the short allele) or LS (heterozygous) genotypes showed the highest delinquency scores. Among individuals having low family SES, boys with the LL (homozygous for the long allele) genotype and girls with the LS (heterozygous) genotype showed the highest delinquency scores. The present study suggests evidence for an interaction between family SES and the 5‐HTTLPR genotype in relation to juvenile delinquency. Aggr. Behav. 39:52‐63, 2013. © 2012 Wiley Periodicals, Inc.     

The Role of Switching,Inhibition and Working Memory in Older Adults' Performance in the Wisconsin Card Sorting Test

ABSTRACT

The Wisconsin Card Sorting Test (WCST) is considered a typical executive test. However, several interesting questions are still open as to the specific executive processes underlying this task. In the present study, we explored how local and global switching, inhibition and working memory, assessed through the Number–Letter, the Stop Signal and the Reading Span tasks, relate to older adults' performance in the WCST. Results showed that older adults' performance variability in the number of perseverative errors was predicted by the local switch component of the Number–Letter task. Results also showed age-related differences in inhibition, working memory and global switching, while local switching resulted largely spared in aging. This study provides evidence that switching abilities may contribute to performance of older adults in the WCST. It also provides initial evidence suggesting that switching processes, associated with local switch costs, are involved in performance on the WCST, at least in older adults.