Data obtained under naturalistic conditions do not support the notion of a close fit between the growth of geometric concepts during the concrete operational period and "realism" in art. Realism here refers to the ability to portray the objective proportions of a figure, to coordinate spatial relations and distances, and to represent a…

Twelve learning disabled (9-12 years old) boys were identified according to special class placement, WISC-R (Wechsler Intelligence Scale for Children-Revised) and performance measures. A group demonstrating a verbal WISC-R deficit was sex- and age-matched with a normal group. Electroencephalograms (EEGs) were collected while these individuals…

This paper reports two related experiments, the first investigating whether children 3-7 years old demonstrate Flavell's Level-2 perspective-taking in a cognitively simple task, and the second re-examining children's performance on a task comparable to the Piagetian 3-mountain perspective-taking task. The first experiment involved a task which…

Investigated preschoolers' understanding of two distance principles: the direct-indirect and the same-plus principle. Children did better on tasks relevant to the principles than on principle-irrelevant tasks. Concluded that even young children conceive of distance as fixed intervals. (SKC)

The relationship between the manner in which environments are encountered and the nature of environmental features in the construction of spatial representations was examined. It was found that performance of a thematic activity facilitated construction of a spatial representation of a large-scale environment. (PCB)

Reports the results of a cross-cultural study of the development of five spatial competencies in samples of Thai and Australian children. The pattern of development was found to be similar for seven- and eight-year-olds but different for four- and five-year-olds. (Author/JN)

A study involving 23 blind students (6-12 years old) revealed that age at onset of blindness did not appear to be critical in mastery of space concepts. One-third of the Ss exhibited atypical spatial development, g mastering relative positions of left and right before mirror-image orientation. (Author/CL)

Explains Piaget's concepts of "subject-object" and "subsystem" interactions in problem solving and describes a test that substantiates Piaget's hypothesis and points to antecedent conditions that appear to stimulate imaginal structures. (SB)

Aims to develop new procedures to collect and analyze data pertaining to spatial development, to explicate a neo-Piagetian model within which these data can be examined, and to assess the validity of this model in tasks requiring perceptual skills and/or rotation (perspective) skills. (RH)

Examined whether spatial classification is discovered during play and if external products of play lead children to use space to represent similarity. Found through two experiments--a longitudinal study of four children's classification behaviors, and the examination of play behavior with two types of objects--that comparison of different kinds…

Nine experiments examined 6- to 10-month-olds' formation of an abstract category representation for "between." Findings indicated that older, but not younger infants, could form an abstract category representation for "between" when performing in an object-variation version of the between categorization task. Six- to…

Examined the ability of 1-year olds to remember the location of nonvisible targets. Found that infants were able to associate a nonvisible target with a direct landmark and to code its distance and direction with respect to themselves or the larger framework. Difficulty of coding with indirect landmarks was associated with cognitive complexity and…

This study investigated whether deafness contributes to enhancement of visual spatial cognition, independent of knowledge of sign language. Comparison of 12 congenitally deaf children not exposed to sign language and 12 matched hearing controls found that the groups did not differ in their performance on visual spatial skills tests. (Author/DB)

Two experiments explored how infants learn to form an abstract categorical representation of support (i.e., on) when habituated to few (i.e., 2) or many (i.e., 6) examples of the relation. When habituated to 2 pairs of objects in a support relation, 14-month-olds, but not 10-month-olds, formed the abstract spatial category (i.e., generalized the…

Four experiments used a preferential looking method to investigate 6-month-old infants' capacity to represent numerosity in visual-spatial displays. Building on previous findings that such infants discriminate between arrays of eight versus 16 discs, but not eight versus 12 discs (Xu & Spelke, 2000), Experiments 1 and 2 investigated whether…