To illuminate how within-family differences in achievement may emerge, this study examined sibling experiences in middle childhood as predictors of sibling differences in college graduation. First- and second-borns from 152 families reported on their experiences with siblings and parents at ages 11.80 (SD = 0.56) and 9.22 (SD = 0.90),…

Longitudinal data were obtained from 157 children aged 3 years 3 months to 5 years 6 months at Time 1. At Time 2 these children had aged an average of 12 months. Theory of mind (ToM) and executive functioning (EF) were measured at both time points. Results suggest that Time 1 ToM scores predict Time 2 EF scores. Detailed examination of sibling…

The current study examined whether parental and contextual risk factors contribute to mothers' and fathers' differential treatment (MDT/FDT) when accounting for sibling dyad characteristics. Also explored was whether family type (single mothers vs. 2 parents) moderated the links between the parental and contextual correlates and MDT. One hundred…

Latent growth curve modeling employed data from a longitudinal study of 451 sibling families to examine parents, siblings, and family economics as factors in individual differences in the developmental course of interpersonal aggression during adolescence. Findings suggest that individual change in interpersonal aggression during adolescence can…

Observed in a laboratory setting how dyads, ages 4 and 6 years or 6 and 8 years, negotiated division of toys. Found that children used a preponderance of constructive problem-solving strategies rather than contentious tactics. Degree of conflict of interests and quality of sibling relationships predicted use of problem-solving and contentious…

Examined sibling influence on delinquency in 164 brother and sister pairs over 4-year period. Found that sibling similarity for self-reports of delinquent behavior were highly correlated for brothers and sisters. Conditional effects of high hostile-coercive relationships and older sibling delinquency predicted younger sibling delinquency in both…

Compared attitudes, expectations, and behaviors of early adolescent girls with an adolescent childbearing sister to those of girls with nonchildbearing adolescent sisters. Found that the younger sisters of childbearing adolescents were consistently different from those of nonchildbearing adolescents on key characteristics known to be correlated…

Examined first-born preschoolers' adjustment to siblinghood, as indexed by security of attachment, in 194 2-parent families. Security of firstborn attachment decreased significantly after a secondborn's birth, but the decrease was smaller among firstborn under 24 months than among 2- to 5-year-olds. Mothers' marital harmony, affective involvement,…