Article2000

Summed-score linking using item response theory: Application to depression measurement.

Maria Orlando · Cathy Donald Sherbourne · David Thissen

118 citations0/0 files storedPsychological Assessment

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Psychometric Methodologies and Testing Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes Psychological Testing and Assessment

Abstract

An item response theory (IRT) approach to test linking based on summed scores is presented and demonstrated by calibrating a modified 23-item version of the Center for Epidemiologic Studies Depression Scale (CES-D) to the standard 20-item CES-D. Data are from the Depression Patient Outcomes Research Team, II, which used a modified CES-D to measure risk for depression. Responses (N = 1,120) to items on both the original and modified versions were calibrated simultaneously using F. Samejima's (1969, 1997) graded IRT model. The 2 scales were linked on the basis of derived summed-score-to-IRT-score translation tables. The established cut score of 16 on the standard CES-D corresponded most closely to a summed score of 20 on the modified version. The IRT summed-score approach to test linking is a straightforward, valid, and practical method that can be applied in a variety of situations.

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References

2013Diagnostic and Statistical Manual of Mental Disorders 1977The CES-D Scale 1992The MOS 36-item short-form health survey (SF-36). I. Conceptual framework and item selection.1961Probabilistic Models for Some Intelligence and Attainment Tests 2012Applications of Item Response Theory To Practical Testing Problems 1968ESTIMATION OF LATENT ABILITY USING A RESPONSE PATTERN OF GRADED SCORES1 1997Handbook of Modern Item Response Theory 1984Item Response Theory: Principles and Applications

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