Findings indicated that among children between 15 and 35 months observed in a series of play and clean-up tasks, there was a consistent developmental pattern in the extent to which they focused on producing outcomes, and monitored, corrected, and controlled activities, and in the frequency with which they reacted to their outcomes with positive…

Results indicated that the more frequently the children studied expressed emotion, the older the age of language achievements; and the more time spent in neutral affect, the younger the age of language achievements. (PCB)

Investigated genetic change and continuity within the domains of temperament, emotion, and cognition and language for 200 pairs of twins assessed at 14 and 20 months of age. Correlations of measures at the two ages indicated that individual differences in the second year of life showed greater change than continuity on most measures. (MDM)

Reviews research on the determinants and the effects of parents' attributions. The evidence suggests that parents do form attributions for their children's behavior; these attributions vary in predictable ways across judges (mothers versus fathers), targets (age or sex of child), and behavior outcomes (positive or negative); and attributions…