Figure 2 The first subtest is for central attention. It requires the identification of a silhouette of a car or truck presented in a central fixation box. The second subtest measures divided attention and involves identification of the central target along with localisation of a simultaneous peripheral target (silhouette of a car) presented at a fixed eccentricity of 12.5 cm from the central target, near the edge of the screen (at approximately 30° visual angle). The peripheral target is presented at one of eight locations along the cardinal and oblique axes. The subject is asked to identify the centrally presented object and to locate the direction of the peripheral target. The third subtest repeats these two tasks, but also includes additional visual distracters consisting of triangles or rectangles of the same size and luminance as the peripheral targets, which fill the rest of the visual display. Pictures of the Useful Field of View (UFOV) subtests are reprinted with permission of Visual Awareness, Inc. UFOV® is a registered trademark of Visual Awareness, Inc.