Lawson J S, Inglis J
Queen's University Kingston, Canada.
J Clin Psychol. 1988 Mar;44(2):252-8. doi: 10.1002/1097-4679(198803)44:2<252::aid-jclp2270440226>3.0.co;2-8.
A method is discussed for securing Factorial Verbal and Factorial Performance IQs from the WISC-R by means of an orthogonal rotation of the axes that describe the plane of the first two principal components derived from an analysis of the intercorrelations of the WISC-R subtests. The reliability and validity of these IQs also are described. Sex differences in normal children are found, as well as differences between normal and learning-disabled children.