The Impact of Correction for Guessing Formula on MC and Yes/No Vocabulary Tests’ Scores

A standard correction for random guessing (cfg) formula on multiple-choice and yes/no examinations was examined retrospectively in the scores of the intermediate female efl learners in an english language school. the correction was a weighting formula for points awarded for correct answers, incorrect answers, and unanswered questions so that the expected value of the increase in test score due to guessing was zero. the researcher compared uncorrected and corrected scores on examinations using multiple-choice and yes/no formats. these short-answer formats eliminated or at least greatly reduced the potential for guessing the correct answer. the expectation for students to improve their grade by guessing on multiple-choice and yes/no format examinations is well known. the researcher examined a method for correcting for random guessing (cfg) 11 no knowledge11 on multiple- choice and yes/no vocabulary examinations by comparing application and non-application of correction for guessing (cfg) formula on scores on these examinations. it was done to determine whether the test takers really knew the correct answer, or they had resorted to a kind of guessing. this study represented a unique opportunity to compare scores from multiple-choice and yes/no examinations in a setting in which students were given the same number of questions in each of the two format types testing their knowledge over the same subject matter. the results of this study indicated that the significant differences were highlighted between the subjects' scores when cfg formula was applied and when it was not.