title: Depression following brain trauma is enhanced in patients with mild discrepancies between intelligence and impairment on neuropsychological scores.
abstract: Analysis of the MMPI (Minnesota Multiphasic Personality Inventory) scores from 135 (20 years to 60 years old) patients who had sustained closed head injuries supported the hypothesis of a nonlinear relationship between the severity of depression and the magnitude of the discrepancy between intelligence and neuropsychological proficiency. Although the MMPI Depression T scores for all groups of patients were elevated (M = 78, SD = 13), patients with the least and greatest discrepancies between intelligence and neuropsychological proficiency scored lower on Depression than patients with discrepancies within the z-score ranges -2.0 and -1.1. The results of symmetrical covariance for either depression or complex partial epileptic-like experiences before comparisons between groups suggested depression and the epileptic-like experiences share the same source of variance.
authors.affiliation: Clinical Neuropsychology Laboratory, Laurentian University, Sudbury, Ontario, Canada.
authors.forename: M A
authors.initials: MA
authors.lastname: Persinger
mesh_terms: D000328:Adult; D001930:Brain Injuries / Q000150:complications* / Q000175:diagnosis / Q000523:psychology; D003866:Depressive Disorder / Q000175:diagnosis* / Q000209:etiology; D017029:Epilepsy, Complex Partial / Q000175:diagnosis; D005260:Female; D006801:Humans; D007360:Intelligence; D008950:MMPI / Q000706:statistics & numerical data*; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests / Q000706:statistics & numerical data*; D014888:Wechsler Scales / Q000706:statistics & numerical data*