Selected linguistic and perceptual abilities of empirically derived subgroups of learning disabled readers |
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| Authors: | Reid Lyon Susan Reitta Bill Watson Bruce Porch John Rhodes |
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| Institution: | Program in Learning Disabilities The Francis Searle Building 2299 Sheridan Road Northwestern University Evanston, IL 60201, USA;Department of Educational Psychology University of Alabama in Birmingham Birmingham, AL 35233, USA;Department of Special Education University of New Mexico Albuquerque, NM 87106, USA;Speech Pathology and Audiology Division Veterans Administration Hospital Albuquerque, NM, USA;Department of Psychology and Neurology University of New Mexico Albuquerque, NM 87106, USA |
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| Abstract: | A battery of eight linguistic and perceptual tests chosen because of their use in previous research and in the public schools was administered to 100 school-verified verified learning disabled readers (LDR) and 50 normal readers (NR) matched for age and IQ. Standard scores, derived from a comparison of each LDR child's score with the NR group's performance on each diagnostic measure, were cluster analyzed to identify subgroups within the LDR group. Six LDR subgroups were found. Multivariate analysis of variance and discriminant analysis indicated that all LDR subgroups were significantly different from one another as well as significantly different from the NR group's performance on the diagnostic battery. In addition, significant differences were found among the six LDR subgroups on measures of oral reading, reading comprehension, and spelling skills. However, the six groups did not differ with respect to family history variables and the attainment of developmental milestones. These results were compared with those of previous studies and were examined for their implications for a more precise match between LDR learner characteristics and type of teaching method and/or materials. |
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