title: WAIS-IV GAI and CPI discrepancies in multiple sclerosis and traumatic brain injury.
abstract: We examined relationships between the Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) General Ability Index (GAI) and Cognitive Proficiency Index (CPI) in two clinical samples. The mean pattern produced by 42 individuals with multiple sclerosis (MS) and 47 with traumatic brain injury (TBI) was the same, GAI > CPI. This pattern occurred in 61.9% and 78.7% of the protocols of patients with MS or TBI, respectively. The MS sample earned a significantly larger CPI mean than did patients with TBI. The group means did not differ on the GAI. Patients with TBI had significantly larger GAI-CPI discrepancy score means than those with MS. Receiver operating characteristics (ROC) analysis assessed the ability of GAI-CPI discrepancies to differentiate the samples. The area under curve (AUC) was 0.67, 95% [0.55, 0.78], which indicated low accuracy in terms of group classification.
authors: a Psychological Science , University of Central Missouri , Warrensburg , Missouri , USA.
authors: Joseph
authors: J
authors: J Ryan
authors: a Psychological Science , University of Central Missouri , Warrensburg , Missouri , USA.
authors: David S
authors: DS
authors: Kreiner
authors: b Medical College of Wisconsin , Milwaukee , Wisconsin , USA.
authors: Laura
authors: L
authors: Glass Umfleet
authors: c Mercy Health , Youngstown , Ohio , USA.
authors: Samuel T
authors: ST
authors: Gontkovsky
authors: d Austin Neuropsychology PLLC , Austin , Texas , USA.
authors: Allison
authors: A
authors: Myers-Fabian
mesh_terms: D000293:Adolescent; D000328:Adult; D000070642:Brain Injuries, Traumatic / Q000523:psychology*; D005260:Female; D006801:Humans; D007360:Intelligence / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000523:psychology*; D009483:Neuropsychological Tests; D011594:Psychometrics; D015203:Reproducibility of Results; D014888:Wechsler Scales; D055815:Young Adult
keywords: Cognitive Proficiency Index (CPI); Full Scale IQ (FSIQ); General Ability Index (GAI); Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV); multiple sclerosis; traumatic brain injury