It has become increasingly popular in schizophrenia research to use alternate modes to adminsiter neuropsychological tests. Alternate modes of administration are designed to increase the efficiency of administration and the reliability of scoring. It is assumed that changing the form of administration does not affect the performance of the subjects, however, there have been few studies that examine whether changes in the mode of administration affect performance. As part of a comprehensive assessment, 93 schizophrenia inpatients, 41 schizophrenia outpatients, and 98 non-patient controls completed either the standard, computerized or booklet version of the Category Test. Schizophrenia inpatients made significantly more errors regardless of the version of the test, with the inpatients committing the most errors on the standard version of the test and the least on the booklet version. In contrast, non-patients had the most errors on the booklet version and the least on the computer version. Schizophrenia outpatients were then compared to the same non-patients on the booklet version. There was no significant difference found. The findings of this methodological study have particular relevance to the field of schizophrenia because numerous alternate modes of administering tests are being introduced without considering how changes in the mode of administration might influence the results.