Young children's positive affect in scripted laboratory procedures and in free-flowing social interactions may reflect the activation of related but distinct aspects of positive emotionality (PE), with different implications for self-regulation. The authors observed children's PE in scripted laboratory procedures and in naturalistic interactions with mothers in 2 studies: at 9, 14, 22, 33, and 45 months (the Parent-Child Study, N=112) and at 7, 15, 25, 38, and 52 months (the Family Study, N=102). Measures of self-regulation included effortful control (observed in the Parent-Child Study at 22, 33, and 45 months and in the Family Study at 25, 38, and 52 months) and rule-compatible conduct (observed in the Parent-Child Study at 56 and 73 months and in the Family Study at 38 and 52 months). In both studies, 2 PE measures had distinct implications: PE in scripted procedures related negatively, whereas PE in mother-child interactions related positively to self-regulation. In both studies, those differential effects were particularly clear for children's effortful control. A view of early PE as having a heterogeneous nature may inform researchers' understanding of its role in the developing personality.

Parents' personality was examined as a moderator of the impact of demographic risk on parenting in a longitudinal study (N ϭ 102 families). Parents' personality and demographic risk (i.e., education level, age, family income, and family size) were assessed when children were infants, and parents' power assertion, warmth, and positive affect were observed in naturalistic interactions 2.5 years later. Parents' personality moderated the adverse impact of demographic risk on parenting. For parents who had memories of unstable and unhappy childhood experiences and who reported low conventionality, higher risk was linked to more power assertion, but there was no such link for those parents who recalled happy childhood experiences and who embraced conventions. For both parents who lacked a sense of optimism and social trust, and for fathers who reported low conventionality, higher risk was linked to less affectively positive parenting, but there was no such link for parents who were optimistic and trusting or for fathers who were conventional. Higher risk was linked to more power assertion, but only for mothers low in Extraversion and for fathers high in Neuroticism.

Parents' personality was examined as a moderator of the impact of demographic risk on parenting in a longitudinal study (N=102 families). Parents' personality and demographic risk (i.e., education level, age, family income, and family size) were assessed when children were infants, and parents' power assertion, warmth, and positive affect were observed in naturalistic interactions 2.5 years later. Parents' personality moderated the adverse impact of demographic risk on parenting. For parents who had memories of unstable and unhappy childhood experiences and who reported low conventionality, higher risk was linked to more power assertion, but there was no such link for those parents who recalled happy childhood experiences and who embraced conventions. For both parents who lacked a sense of optimism and social trust, and for fathers who reported low conventionality, higher risk was linked to less affectively positive parenting, but there was no such link for parents who were optimistic and trusting or for fathers who were conventional. Higher risk was linked to more power assertion, but only for mothers low in Extraversion and for fathers high in Neuroticism.