Investigated (1) the relationship between the quality of attachment and the development of symbolic play, and (2) differences in the ways mothers of secure and anxious children involved themselves in play. Frequency, duration, and complexity of children's play, along with differences in maternal involvement, were assessed across bimonthly free…

Two studies were conducted to (1) develop measure of infants' executive capacity, defined as difference between infants' most sophisticated level of functioning displayed first in free and then in elicited play and (2) to test several hypotheses regarding relationship between these performance and competence measures of child functioning and home…

Distress in response to brief maternal separations was examined in a sample of 93 predominantly home-reared infants using the Ainsworth strange situation paradigm. At 18 months, the age when separation protests begin to decline, securely attached infants are better able than anxiously attached infants to tolerate maternal separations. (Author/RH)

Tested two models of the relationship between a hypothetical attachment mechanism and an incompatible motivation (a tendency to explore) by pitting two levels of attachment motivation against two levels of exploratory motivation among 15- to 18-month-old infants, alternating freely between play with novel toys at one end of the room and visits…

Examines the effect of an unfamiliar peer in a situation requiring a subject's separation from mother in order to play with attractive toys. Observation of 20 children 18 months old and 20 children 30 months old revealed that peer presence facilitated initial separation for both ages, but that age differences in subsequent behaviors existed. (CB)