Childhood aerobic fitness predicts cognitive performance one year later

Aerobically fit children outperform less fit peers on cognitive control challenges that involve inhibition, cognitive flexibility, and working memory. The aim of this study was to determine whether, compared with less fit children, more fit 9- and 10-year-old pre-adolescents exhibit superior performance on a modified compatible and incompatible flanker task of cognitive control at the initial time of fitness testing and approximately one year later. We found that more fit children demonstrated increased flanker accuracy at both test sessions, coupled with a superior ability to flexibly allocate strategies during task conditions that required different amounts of cognitive control, relative to less fit children. More fit children also gained a speed benefit at follow-up testing. Structural MRI data were also collected to investigate the relationship between basal ganglia volume and task performance. Bilateral putamen volumes of the dorsal striatum and globus pallidus volumes predicted flanker performance at initial and follow-up testing one year later. The present findings suggest that childhood aerobic fitness and basal ganglia volumes relate to cognitive control at the time of fitness testing and may play a role in cognitive performance in the future. We hope that this research will encourage public health and educational changes that will promote a physically active lifestyle in children.     

The Impact of Background Television on Parent–Child Interaction

This study investigated the hypothesis that background television affects interactions between parents and very young children. Fifty-one 12-, 24-, and 36-month-old children, each accompanied by 1 parent, were observed for 1 hr of free play in a laboratory space resembling a family room. For half of the hour, an adult-directed television program played in the background on a monaural television set. During the other half hour, the television was not on. Both the quantity and quality of parent–child interaction decreased in the presence of background television. These findings suggest one way in which early, chronic exposure to television may have a negative impact on development.     

世界上最幸福的地方

当今世界哪里的人们对生活最为满意呢？经济合作与发展组织（OECD）新近发布的一项研究报告,显示北欧国家人们的幸福指数最高,这个设在法国巴黎,由30个民主政府组成的机构经常提供经济和社会方而的统计数据。     

Threads of local continuity between centralized and decentralized causality: Transitional explanations for the behavior of a complex system

One line of research on student understanding of complex systems has tended to emphasize discontinuities between common misconceptions and relatively more sophisticated understandings. Other work has focused on instruction while acknowledging the existence of other ways of understanding complex systems, but less emphasis has been on examining the knowledge structures within these intermediate ways of understanding. This study takes a microgenetic approach to examining student’s explanations for the behavior of complex systems. Using the Knowledge-in-Pieces epistemological perspective, the analysis documents a continuity of reasoning patterns across less prototypically centralized and more prototypically decentralized (a more sophisticated causality) explanations while explaining the movement of sand dunes. The first analysis examines 31 interviews and shows that many reflected a general reasoning pattern that encompassing some combination of an initial centralized explanation, a final decentralized explanation, and transitional explanations. A second analysis examines a single student’s reasoning pattern and finds that the activation of relevant intuitive knowledge pieces (p-prims) and transitional explanations function as threads of continuity across the continuum of reasoning patterns. These findings suggest that students are able to exhibit a continuity of reasoning patterns across centralized to decentralized causality and are able to access productive intuitive knowledge about complex systems that are applicable to both the macro and micro levels of sand dune movement. Implications suggest that future research investigate these transitional explanations along with the mechanisms of shifting explanations that can account for this robust continuum.     

Dyadic effects of gratitude on burden,conflict, and contribution in the family caregiver and sibling relationship

Family caregivers are a quickly growing population in American society and are potentially vulnerable to a number of risks to well-being. High stress and little support can combine to cause difficulties in health and personal relationships. Siblings are, however, a possible source of protection for the at-risk caregiver. This study examines the relationships between caregiver burden, relational conflict, individual contribution, and gratitude exchange between caregivers and their siblings as they attend to the issue of caring for aging parents. Dyadic data were collected through an online survey and were analyzed using a series of actor–partner interdependence models. Dimensions of gratitude related to reduced caregiver burden, improved care-related conflict, and promotion of greater contribution to caregiving.     

SCHOOL PSYCHOLOGISTS AS MENTAL HEALTH PROVIDERS: THE IMPACT OF STAFFING RATIOS AND MEDICAID ON SERVICE PROVISIONS

As one out of five children in the United States demonstrate some type of mental or behavioral health concern warranting additional intervention, federal policies have emphasized the need for school‐based mental health (SBMH) services and an expansion of Medicaid reimbursement for eligible children and families. Most youth access mental health services at school; therefore, it is important to evaluate how staffing ratios, credentialing, and state Medicaid policies may influence school psychologists’ involvement in the delivery of SBMH services. A survey of 192 school psychologists found that as practitioner to student ratios increased, the availability and provision of SBMH services decreased. As state Medicaid policies have been found to influence the provision of mental health services at school, current study results demonstrate an association between state level Medicaid policies and the number of school psychologists qualified to bill for Medicaid‐reimbursable services. Implications for service delivery and policy development are discussed.