Developmental versus sensory deficit effects on perceptual processing in the reading disabled Article Received: 29 September 1987 Accepted: 17 May 1988 DOI:
Cite this article as: Brannan, J.R. & Williams, M.C. Perception & Psychophysics (1988) 44: 437. doi:10.3758/BF03210428 Abstract
Thirty children and 5 adults participated in two experiments designed to compare visual processing in normal and reading disabled children. The children were aged 8, 10, and 12 years. In Experiment 1, subjects were asked to detect the temporal order of two briefly presented stimuli. In Experiment 2, subjects sorted cards containing bracket stimuli that did or did not produce perceptual grouping effects. Poor readers required more time to make accurate temporal order judgments and showed stronger perceptual grouping effects. For both good and poor readers, the amount of time necessary to make a correct temporal order judgment decreased, and perceptual grouping effects became weaker with age. However, the magnitude of the difference between the groups did not lessen with age. These results suggest that there are visual processing differences between good and poor readers that do not appear to correct by age 12.
Portions of this research were presented at the 1987 meeting of the Association for Research in Vision and Ophthalmology, Sarasota, FL.
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