Man's phylogenetic development has resulted in a potential for environmental interaction in a symbolic and conceptual manner. There are ontogenetic requirements to develop such potential. The process by which man learns is sequential and involves perceptual-motor-cognitive abilities. There is an optimum respectivity period at each developmental…

In Piaget's dynamic conception of the child's cognitive growth, the transition from sensory-motor intelligence to the developmental stage of representational intelligence occurs during 5 to 7 years of age. The development proceeds from undifferentiation to differentiation, from unintentional to intentional, from unintelligent to intelligent, and…

Findings from relevant research applying Piaget's theory to mental retardation, psychosis, and autism are reviewed. Many autistic individuals show an arrest in operative functions at the sensorimotor functions. The early arrest interferes with subsequent development of higher-level conceptual, symbolic, and social skills. (Author)

An experiment demonstrating that children in Piaget's preoperational stage, who generally still cannot give conceptually correct answers to questions about rate and time, evidence an ability to imitate a given rate-time relationship demonstrated by the experimenter. (ST)

This study attempted to ameliorate the educational deficits of infants using structured tutorial programs of language and concept training in the home. It was part of a larger project whose purpose was to determine the age at which intervention will produce maximum acceleration of cognitive development. Subjects were 20 disadvantaged 8- and…

The development of and relationship between early language, symbolic play, sensorimotor skills, and social development were examined in a longitudinal study conducted in Japan with two young autistic males who were observed from the approximate ages of 2 to 4 years in clinic, day care, and home settings. One child acquired speech; the other did…

Educational implications and symptoms are described for learning disorders, the disruption in the processing of information within the central nervous system caused by brain damage, emotional disturbance, or inadequate presentation of learning experiences. Developmental sequences, developmental progression, and restoration of development are…