Quick Test IQs (combination form) correlated highly with WAIS Full Scale IQs (.80, .79) and WAIS Verbal IQs (.86, .79) obtained from separate groups of 48 brain-injured and 48 schizophrenic Ss. Significantly lower relationships were found between Quick Test IQs and WAIS Performance IQs (.60, .56). These results were interpreted as supporting the position that the Quick Test is a valid, reliable estimate of intelligence which “holds up” with populations notorious for their variability and which seems resistant to the type of reduction in performance on intelligence test tasks often associated with psychopathology.
Forty schizophrenic patients equally divided among four groups on the basis of their premorbid history and the length of time they had been hospitalized were given the WAIS. The WAIS IQ for poor premorbids tended to be higher than for good premorbids, but good premorbids demonstrated significantly higher motor performance (WAIS Digit Symbol and Block Design). There appeared to be a relationship between lower verbal abstractive and decisionmaking abilities (WAIS Comprehension and Similarities) and length of institutionalization. These last results may be interpreted as suggesting that, for schizophrenics at least, performance on certain types of intelligence test tasks may be lower for patients who have undergone prolonged institutionalization.
Quick Test IQs (combination form) correlated highly with WAIS Full Scale IQ for 43 neuropsychiatric inpatients. A significantly higher relationship was found between WAIS Verbal IQ and QT scores than between WAIS Performance IQ and QT scores. The results were interpreted as supporting the position that the QT is a good estimate of intelligence which is highly resistant to the reduction in performance on some intelligence test tasks often associated with psychopathology.
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