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Overall, John E.; Hollister, Leo E. – Journal of Clinical Psychology, 1980
Empirical cluster analysis methods have been the basis for development of a phenomenological classification of depressive disorders. Verbal descriptions of the distinguishing features of anxious, hostile, agitated, and retarded subtypes of depression are provided to facilitate development of clinical classification concepts. A review of validity…
Descriptors: Adults, Behavior Patterns, Classification, Cluster Analysis
Dykens, Elisabeth M. – American Journal on Mental Retardation, 1995
This paper considers key properties of behavioral phenotypes of mental retardation syndromes, including within-syndrome variability and between-syndrome similarities and qualitative differences. The "new genetics" research requires combining data from three strategies: (1) a psychiatric approach, (2) psychometric methods, and (3) syndrome-specific…
Descriptors: Behavior Patterns, Behavioral Science Research, Genetics, Mental Retardation