The WISC-R subtest scores of 159 black LD children of low socioeconomic status were recategorized into Spatial (Sp), Conceptual (C), and Sequential (Sq) scales as recommended by Bannatyne (1974). As a group, the sample displayed the classic Sp > C > Sq pattern. However, only 18 of the subjects (11.3%) were identified in accordance with the requirement that the differences between categories be statistically reliable for each individual. This subgroup was matched with LD controls not demonstrating the Bannatyne pattern. Analyses of longitudinal reading and math scores revealed no differences between groups. It was concluded that the diagnostic utility of the Bannatyne pattern is questionable.
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