Preferences for moving versus static bars were assessed in 8-, 16-, and 20-week-old infants. Findings revealed that at both 16 and 20 weeks, preferences were affected only by the velocity of the bar's movement. This effect persisted at 20 weeks even when static reference features were added to the display. (RH)

This study was undertaken to determine the progressive development in movement and movement patterns (coordinated movements of body parts used involuntarily to achieve an objective) of children 2- to 6-years-old, to identify general characteristics which may be studied for appraisal of growth and development, and to study variations in movement…