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Assessment, Vol. 15, No. 1, 97-103 (2008)
DOI: 10.1177/1073191107308085

Detection Strategies for Malingering With the Miller Forensic Assessment of Symptoms Test

A Confirmatory Factor Analysis of Its Underlying Dimensions

Michael J. Vitacco

Mendota Mental Health Institute

Rebecca L. Jackson

Pacific Graduate School of Psychology

Richard Rogers

University of North Texas

Craig S. Neumann

University of North Texas

Holly A. Miller

Sam Houston State University

Jason Gabel

Medical Center for Federal Prisoners, Rochester, MN

Two of the most widely used measures for the assessment of malingering in forensic populations are the Miller Forensic Assessment of Symptoms Test (M-FAST) and the Structured Interview of Reported Symptoms (SIRS). The underlying dimensions of the SIRS have been well established in the literature, but the structure of the M-FAST remains relatively untested. Understanding of its dimensions is critical for construct validity and guiding its proper use. Confirmatory factor analysis was used to provide evidence of a single parsimonious malingering factor to account for the covariation of the M-FAST items in a sample of 244 forensic patients. In addition, the model was cross-validated with an independent sample of 210 forensic patients. Finally, the M-FAST factor was modeled in conjunction with two factors of the SIRS. Results provide further validation of the underlying detection strategy found in the M-FAST.

Key Words: malingering • M-FAST • detection strategies • feigned mental disorders


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