THE IMPACT OF TEST FORMS ON IRANIAN HIGH SCHOOL STUDENTS’ KNOWLEDGE OF GENERAL ENGLISH

The present study intended to investigate the impact of test forms on Iranian high school students’ knowledge of General English. The question this study tried to answer was whether or not there was any difference among the means of the teacher - made test, school final exam and OPT test. To answer the question, 30 junior high school students participated in the three target tests: first, they were given an OPT test as the criterion test .Then, school final exam and teacher-made test were given to the students .Each of these tests were administrated after two weeks interval from the previous one. The contents of the three tests, in which vocabulary, grammar, reading comprehension and writing skills were examined, were the same except in the OPT test the content of writing section was different from the other tests. The data was analyzed through One- Way ANOVA. The results indicated that there was no significant difference among the means of the three tests.