27 Ss in a diagnostic clinic for mental retardation were administered the QT and the WISC. The intercorrelations between the QT individual and combination forms were extremely high. Significant rs were obtained between the QT and Picture Arrangement, Coding, Performance Scale scores, and Full Scale scores. The magnitude of the rs, the speed and ease of administration, suggests the QT can be used for deriving an IQ and screening patients in mental retardation facilities.
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