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)

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)