Alternate Impairment Index-Revised: a measure of neuropsychological deficit

The Alternative Impairment Index-Revised (AII-R), a revision of the Alternative Impairment Index (AII), is composed of a weighted set of scores from the Halstead-Reitan Neuropsychological Test Battery. In the research for this article, two experiments were conducted. First, the AII-R is compared with two established measures of neuropsychological deficit, the General Neuropsychological Deficit Scale (GNDS) and the Halstead Impairment Index (HH). Hit rates for agreement on severity for the GNDS and AII-R were 72% (i.e., 18 of 25), and for the HII and AII-R were 60% (i.e., 15 of 25) with patients with brain damage. In the second experiment with normal and psychiatric participants and participants with brain damage, hit rates for agreement of severity of brain damage for the GNDS and AII-R were 63% (i.e., 25 of 40), and for the HII and AII-R were 73% (i.e., 29 of 40).