“…However, the WJ-R visual factor (Gv) emphasizes aspects of visual perceptual processing (e.g., closure speed, visual memory) to a greater extent than spatial ability, making the Gv factor perhaps less sensitive to the type of visual abilities (i.e., spatial visualization and spatial relations) important in math skill development (Geary, Hamson, & Hoard, 2000;McGrew, Flanagan, Keith, & Vanderwood, 1997). In support of this interpretation, others using purer measures of visuospatial ability (e.g., WAIS Block Design: Batchelor, Gray, & Dean, 1990; Standford-Binet IV Pattern Analysis and Copying: Assel et al, 2003;Benton Judgment of Line Orientation: Riccio & Hynd, 1992) have found a relationship between visuospatial ability and math skill.…”