Validity issues in clinical assessment.

Abstract

The data investigators should provide to support the validity of inferences they make based on scores from a measure depend on (a) whether the measure is assumed to assess a hypothetical construct or behavior and (b) the purposes for which the measure is intended. The authors distinguish between the representational phase of validity assessment, which establishes that a measure produces scores that reflect the construct or behavior it purports to assess, and the elaborative validity phase, in which the meaning and utility of scores are examined. Key issues relevant to convergent, discriminant, and criterion-related validity are examined for measures of latent traits or constructs and then for measures of behaviors or response classes.