Facial expressions used by children defending their possession of a disputed object were studied in 72 pairs of kindergarten children. Results showed a relationship between the facial expressions a child used and both his own subsequent behavior and that of his partner. (Author/JMB)

Using a longitudinal design, investigates the interactive behaviors of mothers of normal infants and mothers of infants who are known to differ on a host of cognitive, behavioral, and biological parameters. Examines the developmental course of emotional expressivity in these infants. (HOD)