title: Unusual test score combinations and unusual test score differences.
abstract: Vocabulary and Abstraction scores on the Shipley Institute of Living Scale are used to illustrate the relation between unusual test score combinations and unusual test score differences. It is demonstrated that a combination of two scores can be unusual even though the corresponding difference is not and that a difference between two scores can be unusual even though the corresponding combination is not. Clinicians should be aware that although the two methods of pattern analysis generally will lead to the same conclusion, they need not do so.
authors: Mental Retardation Research Center, Lanterman Developmental Center Research Group, School of Medicine, University of California, Los Angeles, Pomona 91769.
authors: A B
authors: AB
authors: Silverstein
mesh_terms: D004521:Educational Measurement; D006801:Humans; D007807:Language Tests; D011569:Psychiatric Status Rating Scales