The role of cognitive development in the formation of social judgments was investigated in 2 experiments examining children's use of task outcome information in attributional judgments of ability and task difficulty. (SB)

Attempted to determine (1) whether developmental differences existed in children's comprehension of simple necessity and simple sufficiency relationships, and (2) the source of developmental differences in children's causal reasoning. (SB)

The verbal interactions of 20 mothers with their children, who were between 1.9 and 5.0 years old, were recorded and analyzed. (SB)

In a study of the effects of children upon adults, 64 college student subjects served as teachers in 1-to-1 interactions with four 11-year-old child confederates who displayed either high or low amounts of nonverbal cues of positivity. (SB)

This study collected behavioral data on the relationship between children's attentiveness to television commercials and their product requests, using the techniques of operant conditioning and direct observation. (SB)

This study investigated the relationship between the attainment of a Piagetian formal operational concept (proportion) and personal characteristics in 117 children 10 to 12 years old. (SB)

Two predictions based on H. Clark's and E. Clark's hypotheses of the acquisition of word meanings were tested: (1) when learning words which have both spatial and temporal meanings, children will understand the spatial meanings first, and (2) children understand the positive member of an antonym word pair before they understand the negative…

The Developmental Sentence Scoring (DSS) procedure was used to collect normative information about the syntax development of male and female children. (SB)

Picture-grouping and word-association tasks were used to evaluate the hypothesis that paradigmatic (same form class) word associates are not always categorical and may be a function of the child's understanding of interactive and categorical relations. (SB)

A total of 72 schooled and 67 unschooled Tanzanian 8-14 year-olds from the Meru tribe were interviewed individually to determine their degree of mastery of conservation. Methodological defects in the application of Piaget's clinical method in cross-cultural studies were corrected. (SB)

Cognitive organization in problem solving was investigated using a transfer paradigm. (SB)

A total of 134 mothers and their newborn infants were studied in order to evaluate the relationship between neonatal characteristics and mother-infant interaction. (SB)

A series of experiments demonstrated that sharing was a characteristic activity of children 18 months of age and younger. (SB)

The experiment employed four sex-pair combinations, three age groups, and two pretraining manipulations in an effort to evaluate the following predictions with respect to altruism and rivalry: (1) Cooperation pretraining was expected to increase altruism compared with no pretraining, (2) females were expected to be more responsive to the…

The reactions of 112 10-month-old male infants to the property of curvature were examined using a habituation paradigm with lever pressing as an instrumental response. (SB)