This study compared the smiling behavior of 76 infants during a regular day to their smiling during a brief elicitation by the mother and investigated the extent to which a mother is able to intentionally elicit smiling or vocalization. (Author/JMB)

Results showed that first-grade children were less likely to follow a task-based fair-play rule than were third graders when one of the other children was larger and older. When dealing with same-size age-mates, however, first graders were no less likely to follow a task-based rule than were third graders. (Author/CM)

Investigated the accuracy with which subjects of different ages can encode several kinds of cues commonly found in social interactions. Mean ages for the four groups of subjects were 5.5, 7.4, 9.5 and 20.5 years. (Author/SDH)

One hundred sixty sibling pairs from two child families were sampled for sibling interaction behaviors as they relate to measures of categorization style. The study provides additional evidence of the importance of a child's siblings to his cognitive development. (Editor/RK)

Examines modification of mother-child instruction as a function of age of learner in middle childhood (six versus eight years). Instruction and learning were compared on two tasks designed to simulate school and home activities. Results show more intense instruction of all kinds for the younger children in the school task. (RH)