A main aim of this study was to test the claim that individuals with Williams syndrome have selectively impaired memory for spatial as opposed to visual information. The performance of 16 individuals with Williams syndrome (six males, 10 females; mean age 18y 7mo [SD 7y 6mo], range 9y 1mo-30y 7mo) on tests of short-term memory for item and…

The human brain appears to have several "regions" that are structured to do different kinds of spatial thinking, according to a large and rapidly growing body of research in a number of disciplines. Building on a previous review of research with older children and adults, this article summarizes the research on spatial thinking by young children.…

This study examines preschoolers' causal assumptions about spatial contiguity and how these assumptions interact with new evidence in the form of conditional probabilities. Preschoolers saw a toy that activated in the presence of certain objects. Children were shown evidence for the toy's activation rule in the form of patterns of probability: The…

Fragile X and Turner syndromes are two X-chromosome-related disorders associated with executive function and visual spatial deficits. In the present study, we used ocular motor paradigms to examine evidence that disruption to different neurological pathways underlies these deficits. We tested 17 females with fragile X, 19 females with Turner…

The authors investigated how 3- and 4-year-old children and adults use relative distance to judge nearbyness. Participants judged whether several blocks were by a landmark. The absolute and relative distance of the blocks from the landmark varied. In Experiment 1, judgments of nearbyness decreased as the distance from the landmark increased, …

A study tested the possibility that children 16-24 months old and 6-7 years old can code distance without the use of landmarks. Younger children sat with their mothers at the side of a sandbox and watched the experimenter hide a toy in the sand. After being distracted, the children looked for the toy in the box. Nine trials were used, with toys…

The effect of perceptual speed on performance and paper-and-pencil measures of spatial ability is examined. Perceptual speed is defined as speed in comparing figures or symbols, scanning to find figures or symbols, or carrying out other very simple tasks involving visual perception. It was hypothesized that perceptual speed would have more…

Considers aspect of Muchow's work that are relevant for developmental psychology, including her emphasis on the contextual matrix of child behavior, her interest in the sphere of children's action in relation to their cognition of the environment, and methodological implications in her work. (Author/SO)

David, who from September 1971 to February 1984 actively lived his life in a sterile isolator, was severely deprived of experience of the physical world. His difficulty with the concepts of space, depth, and size related clearly to his limited experience rather than to cognitive or visual-motor-perceptual deficits. (Author/CL)

Research on the effects of visual perception and orientation difficulties on academic, communication, and social development of deaf children is reviewed. The need for incorporating methods for remediating learning disabilities into preservice training for teachers of the deaf is emphasized. (CL)

To examine similarly complex spatial tasks, a battery of spatial and logical tests were administered daily for 12 weeks to the total population of a middle school for gifted children. Two cognitive styles were identified: rapid recognition and spatial reconstruction. (Author/CL)

Investigates the ability of four-, five-, and six-year-olds to locate their starting point and retrieve an immobilized object after being blindfolded and moved. Results indicate that, while children as young as four years can coordinate an initial egocentrated target location with what they believe to be their starting point, computation of the…

The role of the spatial relationship between target responses and reinforcers in the discrimination learning of six mentally retarded adults was evaluated. Results showed that discrimination performance was more efficient in the experimental condition (reinforcement located near the correct cue) than the control condition (reinforcement in common…

Deficits in spatial abilities, particularly Mental Rotation (MR), may contribute to women's avoidance of areas of study (such as chemistry) that rely on MR. Those women who do succeed in chemistry may do so because they have MT skills that are on par with their male peers. We examined MR ability on 12 items from the Vandenberg and Kuse MR test…

Two experiments tested the effectiveness of familiar size as information for perceiving distance. In the first experiment, under monocular viewing conditions, adults judged the distances to large and small photographs of faces and to large and small checkerboard ovals equal to the faces in size. In the second, the same displays were presented to…