Investigating the effects of marijuana on human psychological functioning, this study differs from previous research in two ways: 1) it is concerned with relatively complex cognitive processes; 2) it has a theoretical rationale. The general hypothesis of the study states that marijuana will impair its user's ability to form and use abstract…

Four- and seven-year olds were asked to make and explain predictions about their abilities to solve perceptual problems, perform the tasks, and explain their success or failure. Results indicated that young children have some clear-cut knowledge, and misconceptions, about their senses. Between four and seven years, children become increasingly…

A 2 x 2 x 4 factorial design was utilized to investigate the effects of sex of perceiver, race of expressor (Negro and White), and mode of presentation of stimuli (audio and visual, visual only, audio only, and still pictures) on perception of emotion (POE). Perception of seven emotions (anger, happiness, surprise, fear, disgust, pain, and…

This study examines the relationship between development of a child's ability to coordinate perspective and his ability to conceptualize spatial relations on a map. One hundred and four school children from inner city, urban fringe, and suburban schools, grades K-6, were administered a Test of Coordination of Perspectives and a Test of Map…

Seven children with basic perceptual motor problems (learning disorders) in varying severity were selected for a 6-week intensive program. All were from 6 to 8 years old and had mental ages 2 years below their chronological age. Structured and integrated areas of instruction were speech and language, perceptual-motor, gross motor, and aquatics.…