Psychometric equivalence of a paper-based and computerized (iPad) version of the Memory Orientation Screening Test (MOST®).

The Memory Orientation Screening Test (MOST(®)) is a 29-point scale for identifying and following mild and major neurocognitive disorders in older patients. Previous research demonstrated validity in separating patients with normal vs. impaired cognition and high correlations with tests of memory and attention. This study compares the original paper-based MOST(®) with a computerized (iPad app) version, the MOST(®)-96120, to determine the equivalence of formats. A total of 98 consecutive older patients were administered identical versions of the MOST and MOST-96120 in a random order, separated by 1 hour of interspersed testing, in a 3-hour neuropsychological evaluation. MOST and MOST-96120 scores were compared with each other, with global cognitive ratings, and with standardized tests of memory and attention. Both versions had equivalent means and standard deviations, very high inter-test correlation (r = .92, p < .001), and equal correlations with outcome measures. Both versions separated patients into normal vs. mild NCD vs. major NCD categories with equal accuracy. ANOVA showed no significant difference between versions or presentation order. Both versions correlated very highly with cognitive level and neuropsychological endpoints, confirming previous research. The MOST-96120 is a computerized neuropsychological assessment device that demonstrates equivalence with its paper-based original, allowing for confident reliance on the findings of previous research.