Factor analysis of the Revised Wechsler Memory Scale tests in a neuropsychological battery.

The Revised Wechsler Memory Scale (4 scales) along with 13 subtests from the WAIS and Halstead-Reitan battery were subjected to a principal components factor analysis. 9 tests of memory loaded on 5 of the 6 factors indicating that 5 types of memory were isolated. These were immediate verbal memory, recent verbal memory, recent figural memory, figural learning, verbal learning storage. Loading of memory and nonmemory tests on the same factors indicates a closer relationship between some memory and nonmemory processes than between kinds of memory.