Interesting systems, whether biological or artificial, develop. Starting from some initial conditions, they respond to environmental changes, and continuously improve their capabilities. Developmental psychologists have dedicated significant effort to studying the developmental progression of infant imitation skills, because imitation underlies…

Eight experiments were conducted to examine 3- and 3.5-month-old infants' responses to occlusion events. The results revealed two developments, one in infants' knowledge of when objects should and should not be occluded and the other in infants' ability to posit additional objects to make sense of events that would otherwise violate their…

The Early Childhood Prekindergarten Assessment Instrument is a criterion referenced approach designed to help locate the child along a developmental curriculum sequence. Certain skills are analyzed according to auditory, visual, motor, and verbal learning processes, and determine what level the child has attained prior to entering school. Along…