%T THE EFFECT OF FORMATIVE TEST TYPES AND ATTITUDES TOWARD MATHEMATICS ON LEARNING OUTCOMES %A Hari Setiadi %X Abstract—This study aimed to analyze the effect of formative test types and attitude towards Mathematics on learning outcomes. The hypotheses are: (1) The outcome of students' Mathematics learning measured by multiple-choice test items is higher than that on essay test items. (2) There is an interaction effect between the formative test types and attitudes towards mathematics on learning outcomes. (3) The learning outcome of students who have a positive attitude on multiple choice test items is higher compared to those receiving essay test items. (4) The learning outcome of students who have a negative attitude on multiple choice test items is lower compared to those receiving essay test items. Quasi-experimental method was used in this study. Data were analyzed using descriptive and inferential statistics. The sample in this study was 180 Grade 10 students in a government secondary school named SMAN 65, selected by cluster random sampling method. The results showed that: (1) The mathematics learning outcome measured by a multiple choice test was generally higher than that of an essay test, (2) There was an interaction effect between the formative tests and attitude towards Mathematics and the learning outcome in Mathematics, (3) The outcome of Mathematics learning of students who had a positive attitude towards Mathematics was higher compared to those receiving essay test questions. (4) The outcome of Mathematics learning of students who had a negative attitude towards Mathematics was lower compared to those receiving essay test questions. The implications of the study is discussed. %L repository559