The authors argue for a significant shift in how clinical psychology researchers conduct construct validation and theory validation tests. They argue that sound theory and validation tests can best be conducted on measures of unidimensional or homogeneous constructs. Hierarchical organizations of such constructs are useful descriptively and…

Discussed problems and deficiencies in past research on clinical diagnosis, pertaining to sampling problems with regard to clinical subjects studied, adequacy of control groups, base rates, clinical versus statistical significance, lack of cross-validation, and problems due to reliance on inadequate schemes of classification. Future research is…