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  • Title: Disabled vs nondisabled readers: perceptual vs higher-order processing of one vs three letters.
    Author: Allegretti CL, Puglisi JT.
    Journal: Percept Mot Skills; 1986 Oct; 63(2 Pt 1):463-9. PubMed ID: 3774453.
    Abstract:
    12 disabled and 12 nondisabled readers (mean age, 11 yr.) were compared on a letter-search task which separated perceptual processing from higher-order processing. Participants were presented a first stimulus (for 200 msec. to minimize eye movements) followed by a second stimulus immediately to estimate the amount of information initially perceived or after a 3000-msec. interval to examine information more permanently stored. Participants were required to decide whether any letter present in the first stimulus was also present in the second. Two processing loads (1 and 3 letters) were examined. Disabled readers showed more pronounced deficits when they were given very little time to process information or more information to process.
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