For many decades, tool use has been viewed primarily as a cognitive achievement, an ability that separates not only adults and older children from infants, but humans from virtually all other species. According to this standard account, tool use and associated means-ends behaviors are dependent on symbolic or representational thinking. Organisms…

Parker and Gibson's developmental model of evolution of language and intelligence in early hominids is described and discussed; data from a comparative study of object manipulation in two apes and a human infant are reported; and, human ontogenic developmental retardation in locomotion is discussed in terms of its implications for the differential…

Argues that the development of object perception in infancy involves the detection of structural invariants and that such detection is best understood in the context of dynamic events. (Author/MP)

Discusses developmental changes in visual exploration and manipulative investigation among children from birth to six months, six to 12 months, and 12 to 36 months of age. Also discusses pretend play in terms of decentration, decontextualization, and integration. (RH)

Compared the impact of a small box emitting sounds in response to nearby motion introduced into an infant/toddler and a preschool classroom to illustrate qualitative differences in how children of different ages recognize the same objects as mediating devices for activity. Found that the box became a social object for infants/toddlers and part of…

Discusses the development of the human hand from birth to age three as it contributes to the formation of human personality. Considers how parallels in eye, hand, brain, and motor skill development portray the evolving complexity and adaptation of the human grasp and illustrate Montessori theories about the relationship between physical experience…

An interview taped in 1978 with Constance Kamii, a child development researcher who studied Piagetian theory at the University of Geneva, is presented in this document. When asked what teachers of young children should keep in mind, Dr. Kamii talked about teaching to the child's level and cautioned against dealing with symbolic materials, advising…

Maintains that young children learn to think when they act on objects, thus developing what Piaget refers to as physical and logico-mathematical knowledge. Teachers can encourage thinking/mental action by creating situations that are personally meaningful to the children, by providing decision-making opportunities, and by providing opportunities…

Discusses the value of tool-use activities to help toddlers develop emerging skills, experience creative expression, and understand means-end relationships. Provides examples of opportunities for using objects as tools, including language acquisition, self-help activities, dramatic play, sensory experiences, and object manipulation. (DST)

Comments on the articles presented in this issue with respect to their implications for classroom practices. Stresses that in this issue, the researchers describe how social context factors (such as adult viewpoints and adult-child interaction patterns) and physical context factors (such as variations in classroom space-time organization and…