A series of studies focused on (1) the evolution of the notion of identity of objects among infants up to 15 months of age and (2) the changing rules by which this development may be understood. Six identity tasks were presented to 60 infants divided into five age groups: 5, 7, 9, 12, and 15 months. Two objects were used in all tasks. In the first…

This paper presents a cognitive account of both the advantages and disadvantages of direct manipulation interfaces, i.e., the use of icons to manipulate and interact directly with data rather than writing programs or calling on a set of statistical subroutines. Two underlying phenomena that give rise to the sensation of directness are identified.…

The paper reviews cognitive development during the sensorimotor period (approximately the first two years of life) and considers approaches to assessing multihandicapped, deaf-blind, or severely/profoundly retarded students functioning at this level. Evaluation and training of basic sensorimotor schemes (visual fixation and tracking, sucking, and…

The science learning cycle developed by Robert Karplus and others in the 1960's has been a useful model for many science teachers and researchers. This model stresses the use of structured inquiry to organize knowledge acquisition and problem solving. Recent research in the cognitive science tradition, however, has shown that learning and problem…

Research using expectancy models has shown contraceptive choice among adults to be a rational process in that intentions and behaviors reflect an individual's beliefs, values, attitudes, and perceptions of social norms. This study examined whether such an approach could accurately represent adolescents' contraceptive decision-making. It used the…

To examine whether or not retarded individuals have the same structure of intelligence as normal IQ individuals, test scores from the Wechsler Intelligence Scale for Children-Revised (WISC-R), Reitan's Trail Making Test (TMT), and Beery's Developmental Test of Visual Motor Integration (VMI) for both a mildly retarded and normal IQ population of…

A theory of adult cognitive development which includes two post-formal operational stages is described. The paper is divided into three sections. The first section provides background for discussion of the theory. A case study in which various employees in a hypothetical organization react to a problem is provided. Examples of pre-logical,…

The paper reviews research from 1970 to the present in the study of cognitive processing and language in deaf students and adults. Studies address the following topics: differential specialization (direct observation of clinical populations and indirect methods examining handedness, dichotic listening, and visual hemifield differences); cerebral…

Attempts to specify whether previously reported limitations on young children's full-report capacity lay in a smaller amount of available information, in a shorter trace duration of information in visual information storage (VIS), or in poorer coding of information into permanent storage. (Author/ED)

Tests the relations between the concepts of time and space and mechanisms of structural elaboration in young children's cognitive development. (Author/DEP)

Preparation of this paper supported by U.S. Public Health Grant HD-0890, a grant from the Carenegie Corporation, and by U.S. Public Health Grant HD-2680.

Research supported by grant APA-178 from the National Research Council of Canada.

Paper, revised for publication, presented at a Symposium on Heredity and Environment (AERA, New York City, Feb. 16, 1967)

The problems with using Piagetian theory to explore language-thought relationships are two-fold. First there are methodological problems, including the lack of experimental controls and the lack of uniform criteria by which cognitive operations are identified. A second difficulty is the questionable practice of interpreting child language…