Psychometric properties of the visual object and space perception battery in normal older adults

The psychometric properties of the Visual Object and Space Perception Battery (Warrington & James, 1991) were examined in a sample of 111 healthy, older Americans. The potential for culture-related differences and other idiosyncrasies in the standardization samples of British medical patients compelled evaluation of the normative data for use in the United States. Using the normative data provided by the test manual, specificity of the tests ranged from 68-98%. Analysis of variance revealed age-related differences on five of the eight subtests, with subjects age < 70 outperforming subjects age > 70 (p < .001); normative data are provided for these groups. Internal consistency reliabilities (coefficient alpha) ranged from adequate ( >.70) to poor (<.30). Test users should be alert to potential errors in the test materials on the Position Discrimination subtest.