Issues of equality and fairness and invasion of the personal domain, 2 previously identified topic areas of adolescent sibling conflict (N. Campione-Barr & J. G. Smetana, 2010), were examined in 145 dyads ("M" [subscript first-born] = 14.97, "SD" = 1.69 years; "M" [subscript second-born] = 12.20,…

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…

Sixty-four sibling dyads (4-12 years old; 61% males; 83% European-American) were asked to resolve an ongoing conflict. Older siblings provided leadership by suggesting, modifying, justifying, and requesting assent to plans for conflict resolution. Younger siblings countered and disagreed, but also contributed to planning and agreed to their…

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 relations between sibling jealousy and child and family characteristics in families with toddler and preschool-age siblings. Found that positive marital relationship was particularly strong predictor of older siblings' abilities to regulate jealousy in sessions with mothers. Younger siblings' jealous affect with mothers related to child's…

The extent to which maternal behavior, children's temperament, age, and family structure variables are associated with dimensions of sibling relationships was investigated with a sample of 96 families with younger siblings aged 3-6 years and older siblings aged 5-10 years. (PCB)

Examined the possible negative effects of China's 1979 one-child-per-family policy on adolescents born before 1979, preadolescents born during the implementation of the policy, and children born after the policy was implemented. Found that children with siblings reported significantly higher levels of fear, anxiety, and depression than only…

Examined 30 Indonesian toddlers' play with their mothers and siblings. Found that the level of object play and mutual involvement in cooperative social pretend play increased with age. Findings suggest that older siblings can be effective facilitators of pretend play with younger children. (MDM)

Developmental changes in the pattern of 50 families' conversations about feelings were examined when the families' second-born children were 33 and 47 months old. The total amount of talk and the frequency of talk about feelings between sibling pairs increased, whereas the amount of mother-child conversation and references to feelings decreased.…

Examined associations between the activity level and adaptability of same-sex siblings and qualitative aspects of their relationship. Found high levels of conflict when both siblings were high in activity and the older sibling was rated more active than the younger. Conflict was lowest when siblings were low in activity. Warmth was greatest when…

Examined association of three maternal regulating behaviors with children's positive and negative behaviors toward siblings in 40 Japanese families. Observed maternal regulating behaviors more frequently when younger sibling was still in early developmental stage. Older siblings' negative behaviors toward younger positively correlated with…

Two experiments investigated the relationship between family size and "theory of mind." Results from an experiment with three- and four-year olds showed that children from larger families were better able than children from smaller families to predict a story character's mistaken (false-belief based) action. (MDM)

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,…

Mothers' and fathers' responses to their children's spontaneous sibling conflicts were observed. Findings indicated that associations between parents' conflict management strategy and sibling interaction quality varied according to children's ages, gender of the monitoring parent, and type of strategy. Passive nonintervention was highly associated…