Difficulty index in item analysis pdf

These problems can be corrected, resulting in a better test, and better measurement. Item analysis is the process of collecting, summarizing and using information from students responses to assess the quality of test items. Interpreting the item analysis report stony brook university. Compute a difficulty index for each item for in structed and uninstructed groups.

Pdf difficulty index, discrimination index and distractor efficiency. It investigates the performance of items considered individually either in relation to some external criterion or in relation to the. Analysis of each item by calculating difficulty and. Item analysis discrimination and difficulty index 1. Item analysis uses statistics and expert judgment to evaluate tests based on the quality of individual items, item sets, and entire sets of items, as well as the relationship of each item to other items. The difficulty p and discrimination r indices of the items are calculated in this analysis ozcelik, 1989. The closer this value is to 1, the better the item distinguishes the learners who get a high score from those who get a low score.

Analysis of the difficulty and discrimination indices of. Item difficulty, discrimination index and distractor efficiency juliana linnette dsar, maria liza visbal. Item analysis sample of 10 items correct answer is a. The more students got the item right, the less difficult the item was. Review the item difficulty p, discrimination rit, and distractors options be. Item analysis is done to evaluate the quality of mcqs. What exactly is item difficulty and how do you measure it. Item analysis, research in education, difficulty level, discrimination index. Aaron dewald explains how a simple calculation can illustrate which of your exam questions are great, which are too difficult, and. To investigate the relationship of items having good difficulty and discrimination indices with their distractor efficiency to find how ideal questions can. Cara menghitung uji reliabilitas, daya beda dan tingkat kesukaran menggunakan microsoft excel duration. Understanding item analyses office of educational assessment. Item analysis examples so, a test item may have an item difficulty of. Item analysis can help you evaluate how well your objective items are actually working.

When an alternative is worth other than a single point, or when there is more than one correct alternative per question, the item. Performing item analysis is one way that test makers can assess the validity of individual items on their tests. One method is the item question analysis which is a process that examines learner responses to individual test items in order to assess the quality of those items. This means that 70% of the test takers passed the item, and more students in the top group than the bottom group got the item correct. Analyzing item difficulty and discrimination item difficulty. Postvalidation of the mcqs was done by item analysis for difficulty index, discrimination index and distractor effectiveness. The quality of the multiplechoice questions mcqs used in educational measurement. The discrimination index of an item is the ability to distinguish high and low scoring learners. Item analysis below is a sample item analysis performed by mec that shows the summary table of item statistics for all items for a multiplechoice classroom exam. Through item analysis, standardized mcqs having average dif, high discrimination power with large number of functioning distractors can be. Using difficulty and discrimination indices for item analysis. Determining item difficulty and the item discrimination index can show the value of test questions, such as how well each question shows test takers mastery of the material. Analysis report and improve the effectiveness of test items and the validity of test scores. Analysis of the difficulty and discrimination indices of multiple.