Figure 1

Discriminant Validity of Executive Function and Visual Spatial Tests. Receiver operating characteristic (ROC) curves demonstrating the ability of Mindstreams tests to discriminate individuals with mild cognitive impairment (MCI) from among cognitively healthy elderly as compared to traditional neuropsychological tests (MCI: N = 20; Healthy Elderly: N = 15). In (A), discriminability of the Mindstreams Go-NoGo performance index is compared with that of the Wechsler Adult Intelligence Scale, 3rd Edition (WAIS-III) Digit Symbol subtest. In (B), discriminability of accuracy on the Mindstreams Visual Spatial Imagery test is compared with that of the WAIS-III Block Design subtest. Discriminant validity of the Mindstreams tests was better than traditional paper-based tests designed to tap similar cognitive domains. AUC=area under the curve.