The analysis of convergent and discriminant validity is an integral part of the construct validation process. Models for analyzing the convergent and discriminant validity have typically been developed for cross-sectional data. There exist, however, only a few approaches for longitudinal data that can be applied for analyzing the construct…

Fifty years ago, L. J. Cronbach and P. E. Meehl (1955) advocated for the concept of construct validity, noting that psychologists study hypothetical, inferred entities and that validating measures of such entities involves basic theory testing. Three important developments in clinical assessment following that seminal article are noteworthy.…

Method effects as a source of construct invalidity were evaluated for parent, teacher, and child ratings of problem behaviors among 489 children and adolescents with serious emotional disturbances. Multitrait multimethod analysis indicated large method effects for each rater. Such effects may be measurement artifact, situational differences, or…