Eight spatial tests assembled with a mapping sentence of four content facets (rule type, dimensionality, presence or absence of rotation, and test format) were administered to 800 individuals. Smallest Space Analysis of an intercorrelation matrix yielded three facets which formed distinct regions in a two-dimensional projection of a…

Compared to normal readers, the dyslexic children not only drew significantly more "neolithic faces" but also made more errors of spatial displacement (up/down or right/left) on parts of asymmetric figures, while among both groups there were similar percentages who made no errors in the global rotation of figures. (Author/SJL)

Found that preschool children can form abstract concepts of left and right which are not bound to the specific training context: children were able to generalize to new figures and to new spatial locations. The nature of the preschool child's left-right judgments is discussed. (Author/RH)

The processes by which children construct images of anticipated end states of a transposition movement were examined on two tasks. Results support Piaget's (1977) hypothesis that reasoning on the basis of state correspondence defines a developmental level which precedes the development of transformational thought. (Author/MP)

Investigated the ability of preschool and early grade school children to use logical search strategies to find a missing object on a familiar playground. Results indicated that children of all ages studied could deduce a critical search area and were not guided primarily by strong spatial associations. (Author/DB)

The locative categories--"in,""above,""below," and "beside"--were investigated to determine whether their exemplars were organized according to the prototype distinction. (RH)

Accuracy of pattern copying was studied in male and female 10-year-olds. Contrary to expectations, independent of the stimulus size, males benefited from spatial response cues whereas females did not. (Author/DB)

Learning disabled (LD) and nondisabled (ND) students (N=128) at four grade levels (1, 3, 5, and 7) were compared on 10 measures of figural and verbal creativity. Originality was greater for the LD children at all grade levels, while elaboration was greater for the ND children at all grade levels. (Author/PHR)

Investigates spatial orientation of infants, comparing behavior in the laboratory to behavior in the infant's home. Also investigates whether the infant relies on his body as a spatial reference system. (Author/SS)

Investigates the possibility of self-selection in females entering the field of engineering and examines the link between mental rotation performance and performance in academic subjects for 51 male and 52 female students. Results indicate that there were sex differences favoring males in spatial ability tests but there were no significant…

Four experiments examined the ability of infants to form categorical representations for the spatial relations "above" and "below." Found that three- and four-month-olds could form categorical representations for above and below when a diamond-shape was presented above or below a horizontal bar but could not do so when a number…

Studied whether a primary imagery (IM) factor can be identified as a separate dimension of individual differences in the spatial ability domain. Findings for 213 adults suggest the existence of three first-order IM factors, and a second-order confirmatory factor analysis suggests that the visual imagery dimensions can be located within the spatial…

Examined the effects of different text typologies on older users' (age 57-67) performance in hypertext perusal. Compared two text typologies, hierarchical and referential, that were constructed with HTML, and discusses hypertext navigation problems with older users related to human spatial orientation. (Author/LRW)

Describes a study that concluded that children generally treat the spatial locatives "in front of" and "behind" in a nondeictic way when a referent object with an obvious front is involved. Tasks that emphasized the viewpoint of the observer, however, caused a deictic response. (GLR)

A sample of 44 infants of five months of age showed a significant reaching preference for the apparently nearer region of a computer-generated display. This indicated that the infants were sensitive to boundary flow information for depth at an edge. (RH)