We coached participants on symptoms via a brief verbal description they and a written symptom description derived from Wikipedia on each condition. Given the high frequency of PTSD and mTBI overlap in military/veteran samples, this provided a great context for us to examine the MMPI-3’s scale utility. Few studies have evaluated comorbid conditions in validity scale feigning, and symptom sets have previously moderated scale effectiveness (both in simulation designs and in meta-analytic reviews). PTSD offers a largely internalizing pathology symptom-set while TBI is largely somatic/cognitively focused. We picked a four condition design PTSD, mTBI, comorbid PTSD+mTBI since validity scales on the MMPI are designed to detect different symptom sets of invalid responding (e.g., infrequent psychopathology on F and Fp or infrequent somatic/neurological concerns on Fs, FBS, or RBS). In this study (just accepted for publication in The Clinical Neuropsychologist) we examine how effective they were in a simulation, symptom coached design. Three scales include new or reworked items, in addition to the renorming process. Included within the revisions on the MMPI-3 are changes to several of the well-validated MMPI-2-RF over-reporting scales. Study Context The MMPI-3 is the latest revision in the line of the MMPI family of instruments, and includes updated norms and scale revisions.
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