Comparison of the WISC and WISC-R on a psychiatric adolescent impatient sample

The present study compared the WISC and WISC-R on a group of psychiatric adolescent inpatients. The results indicated high intercorrelationss between the two test versions but with the correlation linearly related to the changes in content and administration rules of the WISC-R. Analyses of variance indicated that, on the basis of the Full Scale IQ, the WISC is an "easier" test than the WISC-R.