This study examined the characteristics of the vocal behaviors of parents and preterm infants, as compared to their term-born peers, at three months of age. Potential links between specific features of parental IDS and infants' vocal activity were also sought. We analyzed the frequencies and durations of vocalizations and pauses during the dyadic…

Examined the impact of fathers giving massages to their infants, ages 3 to 14 months, for 15 minutes prior to their daily bedtime for 1 month. Found that fathers who had massaged their infants were more expressive and showed more enjoyment and more warmth during floor-play interactions with their infants than did fathers in the wait-list control…

Forty-nine German 12-month-old infants and their mothers were videotaped in Ainsworth's Strange Situation; a measure of quality of attachment relationships. Forty-six of these infants were videotaped again at 18-months with their fathers. Results are compared to American samples and discussed in terms of parental attempts to cope with the demands…

This study examined the relationship between smile type (basic, Duchenne, duplay) and play type (object, physical, vocal, book reading) during parent-infant videotaped interactions at home. Loglinear analyses revealed that different types of smiles occurred during different types of play more often than expected if distributed equally. Different…

A research study was conducted to: (1) compare mother and father interactions with their newborn infant; (2) examine the effects of maternal drugs on mother-father infant interaction; (3) explore the impact of variations in length of labor on parent interaction; and (4) examine sex of parent and sex of newborn interactions to determine the nature…

This study investigates similarities and differences in the interactions of infants with mothers and fathers, and examines the structural characteristics of social interaction between infants and fathers. Data are based on analyses of videotapes showing face-to-face interaction of five healthy first born infants with their mothers and fathers. The…

This annual report presents several articles related to the work of the Clinical Center for Child Development at Hokkaido University in Sapporo, Japan. The articles are: (1) "Maternal Speech and Behavior during Mother-Infant Play: Comparison between the United States and Japan" (Sueko Toda, Marc H. Bornstein, and Hiroshi Azuma); (2)…