Abstract
Assessed the validity of the Verbal IQ as a short form of the WAIS-R. Ss were 104 psychiatric patients with means for age, education, and Full Scale IQ of 36.22 (SD = 9.04), 12.46 (SD = 1.98), and 93.94 (SD = 12.19), respectively. A correlation of .93 (p less than .001) between the Verbal and Full Scale IQs was found. The average Verbal IQ exceeded the average Full Scale IQ by a small (i.e., 1.65 IQ points) but statistically significant amount (p less than .001). Thirty-three (32%) Ss showed changes in their intelligence categories when the Verbal IQ was compared to the Full Scale IQ. However, when the Verbal IQ was banded by the standard error of measurement (SEM = +/- 3) and the precision range was compared to the Full Scale IQ, results indicated 88% agreement. If clinicians must rely on the Verbal IQ as an estimate of the Full Scale, reporting the score in conjunction with a precision range will increase its accuracy.
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