Six studies which were conducted to determine the effects of testwiseness training on middle school and undergraduate college students' test scores are described. Testwiseness was defined as the cognitive ability or set of skills which a test taker can use to improve his or her score. Testwiseness training presented methods for using deductive reasoning procedures to maximize scores derived from guessing the answer. The treatment consisted of lecture/discussion presentations of Millman's (1969) test-taking principles and Smith's (1982) convergence strategies. The results of the testwiseness treatment were mixed. The studies did not indicate a significant improvement in testwiseness as a result of the training. (DWH)