Debate over whether mental images are visual or spatial representations is seen as based on the false premise that they must be one or the other. Visual neurophysiological research and experiments with a brain-damaged patient (impaired visual representations) suggest that mental imagery has distinct visual and spatial representation components.…

The longitudinal study of 70 children with reading disabilities (followed over four years) and 35 reading disabled children (followed for eight-point-six years) found that rate of improvement in reading and spatial reasoning in disabled and normal children was similar but that reading disability tended to persist into young adulthood. (DB)

Characterizes specific spatial abilities required in geology studies through the examination of the performance of high school students in solving structural geology problems on the geologic spatial ability test (GeoSAT). Concludes that visual penetration ability and the ability to perceive the spatial configuration of the structure are…

In 3 studies, 2.5- and 3-year-olds transferred knowledge from an easy task that required appreciation of a symbolic relation to a more difficult task involving a symbolic relation that children their age typically do not appreciate. Results support the theory that young children use insight into one symbolic relation to understand other symbolic…

Spatial capacities of 36 children ages 5-6 were tested in 3 experiments involving an electronic maze, map training and testing, and finding the way out of a cave using a map. All subjects could use simple maps; this ability improved with age. However, no subject navigated the cave without help, perhaps because of stress or task complexity. (SV)

Four experiments investigated 4-, 6-, and 9-month-old infants' ability to perceive whether the width relationship between a block and the opening of a box specified passing through or support. Found that six- and nine-month olds looked significantly longer than four-month olds when a block wider than a box opening passed through this opening. (MDM)

This article describes a theory of computations underlying the selection of coordinated motion patterns, especially in reaching tasks. The central idea is that stored postures are evaluated for the contributions they make to reaching a spatial target. The model explains a number of aspects of movement kinematics. (SLD)

This article reports the measurement of the "veering tendency" of 4 blind pedestrians over 3 15-trial test sessions. Findings illustrate between-subject and within-subject differences in patterns of veering, and the implications of these differences for orientation and mobility instruction are discussed. (Author)

Investigated the possibility that previous reports of a relation between locomotor status and stage-4 object permanence performance could be generalized to performance on an object localization task. Findings suggest that the effects of locomotor experience on infants' search performance are quite specific and mediated by a variety of factors that…

Wayfinding abilities of 6- and 12-year-old children were compared with those of young adults. Six-year-old children's wayfinding performance was poorest. Twelve-year-old children and adults had similar performances. (GLR)

A mechanism of perceptual analysis by which infants derive meaning from perceptual activity is described. Infants use this mechanism to redescribe perceptual information into image and schematic format. Image schemas enable preverbal thought and provide a foundation for language acquisition. (SLD)

In a study of four-, six-, and eight-year olds, communication about the left-right dimension proved to be particularly difficult for four-year olds. Frames of reference that children incorporated into their directions changed with age and differed for directions about front-back and left-right dimensions. (RH)

An experimental group of 20 gifted adolescents was trained in computer-assisted design (CAD). In comparison with 20 controls, CAD did not improve spatial visualization skills. Skills were not related to gender, grade level, grade point average, or semesters of computer or drafting courses. (SK)

Adults, 9-year olds, and 5-year olds were shown horizontal and vertical lines of various sizes, presented on same wall or different walls, and asked to estimate corresponding area. Responses indicated that when width and height were separated, children gave same weight to both dimensions while adults gave greater weight to larger dimensions; when…

Examined sex differences in 4- to 6-year olds' spatial skill. Found that performance on spatial transformation task showed a substantial male advantage by age 4 years 6 months, with the advantage no more robust for rotation than for translation items. Comparable vocabulary task performance indicated that male advantage on spatial tasks was not…