Clarifying Problems and Offering Solutions for Correlated Error when Assessing the Validity of Selected-Subtest Short Forms

Autor/inn/en	Girard, Todd A.; Christensen, Bruce K.
Titel	Clarifying Problems and Offering Solutions for Correlated Error when Assessing the Validity of Selected-Subtest Short Forms
Quelle	In: Psychological Assessment, 20 (2008) 1, S.76-80 (5 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1040-3590
Schlagwörter	Error of Measurement; Computation; Psychiatric Services; Correlation; Psychometrics; Program Validation; Structural Equation Models; Test Format; Test Validity; Equated Scores; Psychological Studies; Clinical Psychology + Suchen Sie Ihr Suchwort? Messfehler; Psychiatric care; Psychiatrische Versorgung; Korrelation; Psychometry; Psychometrie; Testentwicklung; Testvalidität; Klinische Psychologie
Abstract	The correlation between a short-form (SF) test and its full-scale (FS) counterpart is a mainstay in the evaluation of SF validity. However, in correcting for overlapping error variance in this measure, investigators have overattenuated the validity coefficient through an intuitive misapplication of P. Levy's (1967) formula. The authors of the present article clarify that such corrections should be based on subtest-level versus FS-level data. Additionally, the authors propose a simple, modified equation incorporating FS-level scores that provides liberal and conservative validity measures for comparison across estimation methods, and they demonstrate its use in both a normative (N = 2,450) and clinical psychiatric (N = 216) sample. (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10