The performance of 254 Israeli twelfth graders on multiple-choice tests with positive or negative item stems was studied. For items requiring low cognitive reasoning, performance does not differ, but, for items requiring high cognitive reasoning, the negative mode is more difficult. Implications for test construction are discussed. (SLD)

An investigation of biology matriculation tests in Israel was undertaken to assess the use of justifications with multiple-choice items and to compare the effect of three item formats on students' performance. More specifically, the study was designed to determine the: (1) extent to which justifications will differ if the correct answer is made…