Piagetian levels of 126 volunteers (60 males and 66 females) were measured using the Burney Logical Reasoning Test. Findings demonstrated that the six predictor variables succeeded in explaining 58% (pooled male/female sample), 53% (female sample), and 59% (male sample) of the variance in Piagetian cognitive levels. In addition, since prediction equations developed separately for each sex appeared to be different, the possibility of predicting Piagetian levels separately for males and females was suggested. (Author/SK)