FACTORIAL STRUCTURE OF THE WISCONSIN CARD SORTING TEST

This study examined the factorial structure of the Wisconsin Card Sort ing Test (WCST) in normal university students (N = 135) and a mixed cl inical sample (N = 139). Two highly stable orthogonal factors were obs erved accounting for 70 and 21 per cent of the variance, respectively. Factor I was interpreted as reflecting undifferentiated executive fun ction while Factor II may measure cognitive abilities associated with attentional function. This work can serve as the basis for further exa mination of the construct validity of the WCST and has implications fo r its use.