Although authors have varied opinions, it is the general concensus that the WISC-R is superior to the WISC. This author concurs. However, serious consideration should be given to the research findings before the WISC-R is substituted freely for the WISC as a criterion for special education placement. (Author)

The results of the present study suggested that PPVT and SIT IQs are not directly comparable to the WISC-R IQs when the moderate to low correlation coefficents are considered. In addition, the SIT appears to be more comparable to the WISC-R than does either Form A or Form B of the PPVT. (Author)

So as to compare predicted achievement based upon WISC-R IQs and observed achievement by the WRAT standard scores, both instruments were administered by the same school psychologist to 282 urban students referred for psychological evaluation. The correlations obtained were substantial. (Author)

The data suggest that the WISC-R Verbal, Performance, and Full scales are almost equally lacking in racial bias and that all three scales are less biased than the PPVT. If the PPVT is used for initial screening, it will be important to follow up with a more thorough psychological evaluation. (Author)