Middle class children and adults (n=632) from eight age levels (mean ages 8, 9, 10, 11, 13, 17, 19 and 33 years) were tested with the Profile of Nonverbal Sensitivity (the PONS test) to measure accuracy in decoding nonverbal cues. The prediction that nonverbal skills would increasingly differentiate over ages was confirmed. (RH)

First, third, and fifth graders made judgments of the geographical slant of surfaces depicted in photographs while optical slant and postural orientation were manipulated. The results indicated the existence of a linear mechanism which compensates for the effect of postural inclination. (JMB)

A previously-reported experiment designed to determine if newborn infants can distinguish between an object and a picture of that object is flawed. The experimental design and an improved design are discussed. (BB)

Children ranging in age from three to six years counted 7, 10, and 14 items arranged in columns or in rows. Developmental changes in the spatial strategy and the relation of strategy to accuracy were examined. (JMB)

Analyzes third grade children's performance on the Mueller-Lyer Illusion for whole and partial presentations of the figure. Results do not support Piaget's theory of perceptual development but are consistent with the theory of simultaneous and successive syntheses. (Author/BH)

Sex and, to a partial degree, age had significant effects on sex role differentiation in preschool children, but income level had little effect. (Author/RL)

Studies the effects of perceptual salience on performance in problems requiring the coordination of information. Subjects were groups of children, younger adults, and older adults. For each of the age groups, those problems containing the most salient information were solved faster and more accurately than problems containing the least salient…

Compares the performances of equivalent groups of six- and eight- year-olds in the United Kingdom and the United States on pitch transposition and rhythmic inversion music conservation tasks. Results showed older students outperformed younger. Maintains Piagetian explanations of results are inadequate. (Author/JDH)

Shows that the mother's being employed and the social status of her job were unrelated to preschool children's sex role differentiation. Reports significant main effects for child's sex and for the relation between sex of child and sex of siblings. (Author/RL)