How do you do an item analysis on a test?
Steps in item analysis (relative criteria tests)
- award of a score to each student.
- ranking in order of merit.
- identification of groups: high and low.
- calculation of the difficulty index of a question.
- calculation of the discrimination index of a question.
What is Item Analysis in deped?
Item analysis is intended to assess and improve the reliability of your tests. If test reliability is low, test validity will necessarily also be low. This is the ultimate reason you do item analysis – to improve the validity of a test by improving its reliability.
What is discrimination index of a test item?
The discrimination index (DI) measures how discriminating items in an exam are – i.e. how well an item can differentiate between good candidates and less able ones. For each item it is a measure based on the comparison of performance between stronger and weaker candidates in the exam as a whole.
What is the best way to arrange items on a test?
Arrange items systematically. If the test contains several types of items, group similar items (such as all multiple choice items) together. Provide a clear set of directions for each new group of items. Place the most difficult questions near the end of the test so that students have time to answer more questions.
How do you determine the difficulty of a test item?
Calculating Item Difficulty Count the total number of students answering each item correctly. For each item, divide the number answering correctly by the total number of students. This gives you the proportion of students who answered each item correctly. This figure is called the item’s difficulty level.
What is assessment item analysis?
Item analysis is a process which examines student responses to individual test items (questions) in order to assess the quality of those items and of the test as a whole. The first part assesses the items which made up the exam. The second part shows statistics summarizing the performance of the test as a whole.
What is quantitative item analysis?
Quantitative item analysis happens after the items have been administered and scored. The student responses and item scores provide numeric data that is reviewed for clues about the quality of educational information produced by each item.
What is the difference between difficulty index and discrimination index?
Item difficulty is the percentage of learners who answered an item correctly and ranges from 0.0 to 1.0. The discrimination index of an item is the ability to distinguish high and low scoring learners.