Prorating the Wechsler Memory Scale.

The Wechsler Memory Scale suffers from many weaknesses. Two of these are the lack of adequate norms and standard scores for the individual subtests. Both of these contribute to the difficulty in prorating the Total Raw Score when a subtest is missing. The present paper provides a set of weights, obtained from stepwise regression, to be used in estimating the Total Raw Score when a subtest is missing. The accuracy of these estimates was measured by a double cross-validation. The accuracy of the Memory Quotient estimates also is discussed. The Ss were 122 non-neurological patients (3 female) with a mean age of 46.7 years and a mean education of 11.3 years.