Abstract
Despite widespread use of the Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF), it is surprisingly understudied among adults with attention-deficit/hyperactivity disorder (ADHD). This is significant as ADHD is a frequent referral for neuropsychological evaluation; however, the core symptom of attention difficulty is a nonspecific sequela of many psychological disorders. This study aimed to characterize MMPI-2-RF profiles among adults with ADHD and examine the effect of comorbid psychopathology. A large, demographically diverse sample of 413 consecutive adults referred for neuropsychological evaluation to assist with differential diagnosis of ADHD who completed the MMPI-2-RF was examined. Profiles of the 145 patients diagnosed with ADHD-only were compared to 192 with ADHD and a comorbid psychological disorder and a 55-patient non-ADHD psychiatric comparison group. Among the ADHD-only group, profiles also were compared based on ADHD-presentation type (Predominantly Inattentive vs. Combined presentation). The ADHD/psychopathology and psychiatric comparison groups scored higher than the ADHD-only group across nearly all scales with widespread clinical elevations. Conversely, the ADHD-only group displayed an isolated elevation on the Cognitive Complaints scale. Comparison between ADHD presentations revealed several small-moderate significant differences, the largest of which occurred on the Externalizing and Interpersonal scales. Adults with ADHD alone, and no other psychopathology have a unique MMPI-2-RF profile characterized by isolated elevation on the Cognitive Complaints scale. These results support use of the MMPI-2-RF in assessment of adults with ADHD as it can help distinguish ADHD alone from ADHD/comorbid psychopathology and identify relevant psychiatric comorbidities that may be contributing to patients' inattention complaints.
Published Version
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