Applied performance tests are instruments designed to measure performance in an actual or simulated setting. The identifying difference between applied performance and other tests is the degree to which the instrument approximates the reality of the situation in which the task must be performed. A Clearinghouse for Applied Performance Testing (CAPT) was proposed and undertaken in 1974 by a consortium of four states--Hawaii, Oregon, Pennsylvania and Washington--in cooperation with the Northwest Regional Educational Laboratory. Initially, CAPT emphasized the collection and dissemination of materials concerned with subject matter areas included in a traditional public school setting at grade levels K-12, but since the bulk of the research had been undertaken in business, the military, vocational/occupational training, professional education and adult education, collective efforts have been expanded to facilitate finding materials adaptable for public school use. The procedures used in collecting information, and also other sources for materials on applied performance testing, are discussed. (BW)