B - 99 Timely Matters: Processing Speed and Other Cognitive Corelates of Identi-Fi Accuracy and Time to Completion

Abstract

Abstract Objective The Identi-Fi is a test of visuospatial organization with overall performance represented by the Visual Organization Index (VOI). Though untimed, the Professional Manual indicates administration takes ~10 minutes in the standardization sample. We examined Identi-Fi time of completion (TOC) in a mixed clinical sample and explored whether TOC and VOI are differentially associated with other neuropsychological measures. Method Participants were 240 adults referred for clinical neuropsychological evaluation, 78.3% being aged 60+ (M = 64.50 ± 12.38 years, range = 21–79), male (54.6%), with 14.80 ± 2.89 years of education (range = 7–21). They completed the Identi-Fi and other cognitive tests (WAIS-IV Block Design and Digit Span; Trail Making Test; Boston Naming Test; D-KEFS Color-Word Interference). Correlation and linear regression were used to examine relationships. Results Overall, VOI was low average (M = 85.61 ± 19.00, range = 40–125). TOC was slightly longer (M = 12.92 ± 6.04 minutes, range = 4.07–47.78) than reported in the manual. VOI was correlated with visuoconstruction, confrontation naming, attention, processing speed and executive functions (all p ≤ 0.001), as well as TOC (r = −0.195, p = 0.002) and education (r = 0.136, p = 0.035). TOC was corelated with age (r. = 384, p < 0.001), education (r = 0.141, p = 0.029), processing speed (TMT-A: r = −0.329, p < 0.001; CW1: r = −0.171, p = 0.014), cognitive flexibility (r = −0.230, p = 0.001), and response inhibition (r = −0.269, p < 0.001). TOC was predicted by processing speed (β = −4.986, p = 0.049) even after accounting for age and education. Conclusion TOC may be longer in clinical populations, though this may reflect the older age of this sample. Although time and accuracy on the Identi-Fi correlated with processing speed, accuracy was also associated with other cognitive abilities. Further research into the clinical utility of Identi-Fi TOC is warranted.