This study used the information-processing approach to conceptualize planning and problem-solving abilities and to expand the theoretical and empirical data base of Claudia Allen’s cognitive disability model. The congruent validity of the Allen Cognitive Levels (ACL) test as a measure of cognition, specifically of the fluid information-processing abilities that underlie learning, was investigated. Criterion measures used were subtests of the Wechsler Adult Intelligence Scale–Revised edition (WAIS–R). Forty adult psychiatric patients participated in the study. Spearman r coefficients showed moderately high correlations between the ACL test and the WAIS-R subtests measuring fluid abilities, and Performance scale IQ. These results indicate that Allen’s model and test can be useful in guiding occupational therapy planning when expected outcomes depend on the patient’s learning potential.

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