Presents a study of social- and object-directed behaviors of preschool children in same or mixed age dyads. Subjects were three- and five-year-oldpreschool children. (BD)

In this study self-concept, as measured by subjects' self-ratings of mechanical ability, was correlated to scores on the Pourchot Mechanical Manipulation Test of bilateral hand tool dexterity. Significant relationships were found. Subjects, ages 10-84, differed in results by age, sex, and mechanical experience. (SJL)

A total of 53 rural, impoverished children (37 aged 3-5, from a day care center and 16 5-year-olds from a Head Start Center) were investigated for influences of age and sex on early social behavior. Individuals were observed in 15-minute play sessions and assessed with a standard observational category system. (CS)

Reports a series of studies conducted to investigate possible differences in the exploratory manipulation and play behavior of human infants 7-1/2- 11-1/2 months of age as a function of the attributes of the stimulus, the familiarity of the subject with the stimuli, the age and sex of the infants, and individual differences. (Author/CS)

This paper examines the developmental stages of haptic perception (the process of recognizing objects by the sense of touch alone), and attempts to clarify some conflicting results of studies of the effects of memory and object type. The paper also presents a specific study of haptic perception in 144 preschool and kindergarten children from…