This study examined whether individual differences in personality (development) from adolescence to emerging adulthood were associated with burnout and happiness in emerging adulthood. At Time 1 (2009; M[subscript age] = 15.7 years), Time 2 (2012), and Time 3 (2015), Belgian participants (N = 329; 43.1% boys) reported on the personality dimensions…

The current study examined whether relationships also influence personality trait development during middle and older adulthood, focusing on the individual's perception of support from the relationship partner. Using data from the Health and Retirement Study (n = 20,422; mean age = 65.9 years), we examined the longitudinal relationships between…

Investigates whether temperamental differences mediated infants' responses to the early environment and explores the nature of the relationship between temperament and cognitive-intellectual development. Subjects, 100 six-month-old infants, were observed in their homes three times over a three-week period. Data suggest a greater reactivity to the…

Theories of positive youth development (PYD) regard such development as bases of both community contributions and lessened likelihood of risk/problem behaviors. Using data from the 4-H Study of PYD, we tested these expectations by examining if PYD in Grade 5 predicted both youth contributions and risk behaviors and depression in Grade 6. Results…

Although social change is diverse and ubiquitous, there is to date little research on the impact of social change on individual development, nor on the variables that may mediate and moderate this impact. This lack is, in part, based on insufficient consideration of psychological theories that may be applied to social change, but particularly on…

Substance use and possible factors affecting substance use were assessed for adolescents at 12, 15, and 18 years of age. At ages 15 and 18, higher levels of use were predicted by higher levels of previous use, greater ease of making friends, higher substance use among siblings, and decreases in perceived parental warmth. (BC)