Abstract
The Brain Age Quotient (BAQ) is an actuarial combination of four Halstead-Reitan Neuropsychology Test Battery scores. This study investigated the relationship between the BAQ (short and long forms) and the Halstead Impairment Index (HII), the actuarial combination of seven Halstead-Reitan battery scores. Statistical analysis yielded a Pearson r = 38, p < .O1 for the BAQ short-form versus the HII and a Pearson r = .75, p < .O1 between the BAQ long-form and the HII. Clinical implications as well as further research considerations are discussed.