Introduction

A specific area of concern with the construct validity of self-report cognitive rating scales is the limited evidence for their divergent validity. Some investigators have examined the relationship between cognitive questionnaires and mood state. A small number of executive scales presented in this chapter are objective, clinician-administered tests with a cognitive focus. Rating scales of cognitive functions proliferated in the early 1980s largely in response to researchers’ concerns about the ecological validity of “laboratory-based tests”. The candidate respondents are the person with acquired brain impairment, an informant or the clinician/researcher. Parenthetically, when interpreting correlation coefficients it is noted that some researchers emphasize statistical significance, but in this context the more important issue is the magnitude of the coefficient, not its statistical significance, which is influenced by the size of the sample.