Analyzes third grade children's performance on the Mueller-Lyer Illusion for whole and partial presentations of the figure. Results do not support Piaget's theory of perceptual development but are consistent with the theory of simultaneous and successive syntheses. (Author/BH)

This study investigated the relationship between intramodal and intermodal information processing and performance on traditional age appropriate tests of spatial and perceptual-motor abilities. The ability of 65 normal kindergarten, first grade and second grade children to match to either a tactile or a visual standard was assessed with a modified…