Long-Term Effects of Institutional Care and Enhanced Attachment Relationships on Close Adolescent Friendships

This study examined whether early institutional rearing and attachment security influence the quality and quantity of friendships at age 16 in 138 participants, including children abandoned to institutions in Bucharest, Romania, who were randomized to care as usual (n = 45, 26 female), or foster care (n = 47, 25 female), and a never-institutionalized group (n = 46, 18 female). Adolescents in the foster care group with secure attachment to their foster mothers at 42 months were comparable to never-institutionalized adolescents in having more friends and more positive behaviors with their friend during dyadic interactions, compared to the foster care group with insecure attachment and care as usual group. Interventions targeting early child–caregiver attachment relationships may help foster the ability to build positive friendships in adolescence.     

The Relations among Infant Temperament, Security of Attachment, and Behavioral Inhibition at Twenty-Four Months

The purpose of this study was to examine the relations among infant temperament, attachment, and behavioral inhibition. 52 infants were seen at 2 days, 5, 14, and 24 months of age. Assessments were made of temperament at 2 days and 5 months of age, and attachment and behavioral inhibition were assessed at 14 and 24 months, respectively. EKG was recorded at each assessment, and measures of heart period and vagal tone were computed. Distress to pacifier withdrawal at 2 days of age was related to insecure attachment at 14 months. 2 types of distress reactivity at 5 months, reactivity to frustration and reactivity to novelty, were identified and related to high vagal tone. Attachment classification at 14 months was directly related to inhibited behavior at 24 months. Infants classified as insecure/resistant were more inhibited than those classified as insecure/avoidant. In addition, an interaction of infant reactivity to frustration and attachment classification was found to predict inhibition at 24 months. Infants classified as insecure/resistant and who had not cried to the arm restraint procedure at 5 months were the most inhibited at 24 months. These findings are discussed in terms of hypotheses regarding multiple modes of distress reactivity and regulation in early infancy and their different social and behavioral outcomes.     

Latent Postsecondary Persistence Pathways: Educational Pathways in American Two-Year Colleges

Latent trajectories of credit hour accumulation were modeled using three independent samples of community college students. Five qualitatively distinct patterns of persistence emerged from these samples: Full-time, long-term; 2 years and out; long-term decliners; part-time, long-term; and one term and out. Follow-up analyses using measures on the Community College Student Report indicated that long-term decliner group; the part-time, long-term group; and the one term and out-group were less engaged than full-time students. In particular, the long-term decliner group was the least engaged group. The models illustrate the utility of latent trajectory modeling in higher education research and provide the basis for an empirically based typology of postsecondary persistence pathways. This study was supported by a grant (2890) from the Lumina Foundation.     

Effects of mild running on substantia nigra during early neurodegeneration

Moderate physical exercise acts at molecular and behavioural levels, such as interfering in neuroplasticity, cell death, neurogenesis, cognition and motor functions. Therefore, the aim of this study is to analyse the cellular effects of moderate treadmill running upon substantia nigra during early neurodegeneration. Aged male Lewis rats (9-month-old) were exposed to rotenone 1mg/kg/day (8 weeks) and 6 weeks of moderate treadmill running, beginning 4 weeks after rotenone exposure. Substantia nigra was extracted and submitted to proteasome and antioxidant enzymes activities, hydrogen peroxide levels and Western blot to evaluate tyrosine hydroxylase (TH), alpha-synuclein, Tom-20, PINK1, TrkB, SLP1, CRMP-2, Rab-27b, LC3II and Beclin-1 level. It was demonstrated that moderate treadmill running, practiced during early neurodegeneration, prevented the increase of alpha-synuclein and maintained the levels of TH unaltered in substantia nigra of aged rats. Physical exercise also stimulated autophagy and prevented impairment of mitophagy, but decreased proteasome activity in rotenone-exposed aged rats. Physical activity also prevented H₂O₂ increase during early neurodegeneration, although the involved mechanism remains to be elucidated. TrkB levels and its anterograde trafficking seem not to be influenced by moderate treadmill running. In conclusion, moderate physical training could prevent early neurodegeneration in substantia nigra through the improvement of autophagy and mitophagy.     

The Educational Relevance of Research in Cognitive Neuroscience

The benefits of incorporating findings from cognitive neuroscience into the field of educational psychology are considered. The first section begins with arguments against the idea that one can ignore the brain when positing a model of student learning or motivation. The second section describes limitations in the methods used to reveal brain-cognition relations. In the third section, properties of the brain and brain development are described. The fourth section summarizes the cognitive neuroscientific research on attention, memory, reading, and math. Finally, areas of future research in cognitive neuroscience are suggested that would help answer important questions about individual and developmental differences in student learning.