CONSTRUCTION OF THE ENGLISH LANGUAGE GRAMMAR DIAGNOSTIC TEST FOR GRADE 12 STUDENTS

Abstract

This research aims at constructing the English language Grammar diagnostic test for grade 12 students. The diagnostic test comprised of 3 subsets: Syntax rule, Predicated verb, and Sentence construction, designed to identify English grammatical errors. The samples are divided into 3 group including group 1, 420 individuals, is used to investigate the error and collect incorrect answers to use them as distractor in diagnostic test. Group 2 consisting of 187 individuals, is used for research to assess quality, select, and improve the test items. Group 3 with 375 individuals, is used to collect the grammatical errors. The test construction included the survey test in the form of completing item for identify the grammatical errors from the response of students and English language grammar diagnostic test in the form of multiple choices test with four choices which obtained from the survey test. The diagnostic test was tried out with samples to find validity, difficulty, discrimination, reliability, and cut-off score and to select the qualified items to form the test. The result of the study revealed that the diagnostic test consisted of three subtests; Syntax rule, Predicated verb, and Sentence construction. The content validity index was evaluated by five expert evaluators, with values ranging from 0.6 to 1.00. Difficulty levels ranged from 0.65 to 0.88, and discrimination indices ranged from 0.07 to 0.67. The reliability coefficient of each subtest calculated by the Binomial formula were 0.90, 0.76, and 0.75 respectively. The cut-off score for each subtest were 10, 12 and 6 respectively.