Three formal operations tasks were presented to children of ages 10, 13, and 17. None of the youngest subjects and only half of the older subjects solved the first task without prompts. A few of the younger subjects and nearly all of the adolescents, however, solved the third task without prompts. (Author/JMB)

Data from the observation of sensory stimuli in the premature infant's hospital environment suggest that premature infants may suffer from an inappropriate pattern rather than an inadequate amount of stimulation. (Author/JMB)

Results showed that 2- and 3-dimensional forms affected 4- and 8-week-old infant visual behavior differently. (Author/JMB)

Results showed that infants as young as 10 months of age are responsive to the person and behavior of an unfamiliar peer and that they are no less responsive than older infants (22-24 months of age) to the social versus nonsocial aspects of a novel setting. (Author/JMB)

Assessed the ability of 5-month-old infants to discriminate between auditory tone patterns differing in temporal arrangement but utilizing the same component tones. Heart rate change provided the measure of pattern discrimination. (JMB)

Examined the effects of labeling an infant as a boy or girl on adult-infant interactions. Subjects for the study were 24 fourteen-month-old infants and 24 adult strangers. (JMB)

Young children's comprehension and overdiscrimination of natural language concepts were examined by asking 2- and 4-year-old children to select pictorial instances of five concrete semantic concepts. Results suggest that young children initially tend to use concept labels in a very restricted manner. (JMB)

Presents a study of the early home experiences of a group of 2-week-old infants, equally divided according to social class, birth order and sex. (JMB)

Investigates the generality of stereotypes associated with physical attractiveness and assesses the relative contributions of attractiveness and ethnicity in determining children's behavioral attributions and peer preferences. (JMB)