Limitation of the Problem

9 Diagnostic test can be used to expose learner in relation to a previously expose learner difficulties, gaps in their knowledge and skill deficiencies during a course. Thus, when we know what the problems are, we can do something about them. 12 It means the diagnostic test provide the information about plus and minus of the learners. In addition, Diagnostic test are used to identify students‘ strengths and weakness. 13 Diagnostic test is usually tested in the beginning of lesson, or in the middle of lesson. By using diagnostic test, the teachers are able to identify difficulties or weaknesses that students face in learning process so that they are able to formulate a plan to solve difficulties. e. Summative Test. Summative test is intended to measure s tudents‘ skill after they have finished all subject matter. It is used to administer at the end of a course of study. On his book, The Practice of English Language Teaching, Jeremy Harmer states that, ―Summative test is the kind measurement that takes place to round things off or make a one –off measurement. Such tests include the end-of-year tests that students take or the big public exams which many students enter for. 14 According to Groundlund states ―The last one is Summative Test, which designed to determine the extent to which the instructional objectives have been achieved and is used primarily for assigning course grades or certifying pupil mastery of the intended learning outcomes. 15 Summative tests can use as a problem-solving of the students, and to know how successful students has mastered a wide range of material within a certain period. The statement above means that a summative test is used to given to students after a specific point in instruction to measure their understanding of a subject. Examples of summative test: midterm, final exams and national 12 Harmer. loc. cit., 380. 13 Hughes, op . cit., p. 13. 14 Valette, op. cit., p. 11. 15 Groundlund, op. cit., pp. 12 —13.