Abstract
This study measured unilateral, tachistoscopic naming reaction times of normal and reading disordered children to objects representing two levels of picture vocabulary age. Results of an ANCOVA procedure on the latency data showed main effects for group and stimuli, but not visual field. The latency results suggested parallel, central picture naming operations for each group, with the reading disordered children evidencing significantly longer naming reaction times to each level of stimuli. Arc Sine transformed error data were submitted to an analysis of co-variance procedure and showed a significant stimuli x group interaction. Post hoc tests showed accelerated error rates following right hemispheric stimulation, suggesting anomalous interhemispheric transfer of visual images in the present group of reading disordered children. In addition, left hemispheric stimulations produced significantly more naming errors for the reading disordered subjects as compared to the normal children. Such findings may suggest that a group of higher-ordered processing operations may accompany reading disorders.
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