Microcomputer versions of three commonly used cognitive style measurement instruments are described and demonstrated: the Leveling-Sharpening House Test (LSHT) (Santostefano, 1964); Lowenfeld's Successive Impressions Test I (SIT-I) (1945); and the Group Embedded Figures Test (GEFT) (Witkin, Oltman, Ruskin, and Karp, 1971). At present, many cognitive style instruments are susceptible to a variety of errors, must be individually administered, or are otherwise logistically uneconomical; e.g., LSHT is individually administered and requires that the hand-held pictures be displayed for five seconds each; SIT-I employs a film presentation that requires the subject to respond relatively quickly in order to match the film's presentation pace; and GEFT uses a 32-page booklet for each subject tested. Microcomputers are dependable, precise, and economical. The graphic capabilities of many microcomputers are perhaps their most valuable asset in the delivery of cognitive style diagnostic and research tools. While some tests, such as the LSHT, may still need a trained observer, others such as the GEFT and SIT-I do not need close supervision with the microcomputer version. All three maintain or increase test reliability. These factors and the ease of gathering data should help encourage further research in the use of cognitive styles for the individualization of instruction. (LMM)