A - 178 Development and Psychometric Properties of an Abbreviated Version of the Identi-Fi: a Test of Visual Organization and Recognition.

Abstract

There is a growing demand for efficient neuropsychological screening instruments to better triage referrals for more specialized evaluations. In particular, visuospatial problems tend to appear fairly early in Alzheimer's dementia. The Identi-Fi: A Test of Visual Organization and Recognition is a reliable and valid measure of visual organization ability. Administration and scoring take 15minutes, which precludes its use as a screening instrument. The current study aimed to create a brief version of the test for use in a standard screening battery. The normative sample participants (n = 901) and dementia clinical sample participants (n = 25) were administered the Identi-Fi. Item statistics were examined to develop short versions of the Visual Matching and Visual Recognition subtests with the goal of efficiently differentiating between the normative and dementia groups. Results yielded an 11-item VM (scores ranged from 0-11) and 11-item VR (scores ranged from 0-11) abbreviated subtest. Scores were then used in subsequent ROC curve analyses to determine appropriate cutoff scores with an intent to maximally balance sensitivity and specificity. ROC curve analyses were favorable for both subtests (i.e., AUC ≥ 0.85), with cut scores at ≤7 for VM and ≤ 8 for VR. Sensitivity values ranged from 0.76 to 0.80 and specificity values ranged from.79 to.83 for the measure. Results provide preliminary evidence of an abbreviated version of the Identi-Fi to assist in dementia screening.