The associations between parenting practices and adolescent anxiety symptoms were examined in both individual and monozygotic (MZ) twin differences levels. Participants were 804 pairs of Chinese MZ adolescent twins aged 10-18 years (M = 13.57, SD = 2.67, 52% females). Twins' anxiety symptoms were assessed by self- and parent-reports. Twins also…

Most of the individual difference variance in the population is found "within" families, yet studying the processes causing this variation is difficult due to confounds between genetic and nongenetic influences. Quasi-experiments can be used to test hypotheses regarding environment exposure (e.g., timing, duration) while controlling for…

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…

To assess the influence of personal and environmental factors on the composition of children's networks and the relative amounts and use of time spent with people of various ages, sexes, and roles, 72 Swedish children between the ages of 8 and 11 replied to interview questions about their family members, relatives, friends, and the nonrelative…