9.10 Reviews how item analysis data are used to monitor and improve the quality of test items. Assignments Read page 1 attached re Objective 9.1. All three factors should be used together to improve test reliability. Keep in mind that in addition to increasing the length of a weak test, it will almost certainly be necessary to revise many existing items in the test. Read text pages 123-126 re Objective 9.4.
Item analysis includes both item difficulty and item discrimination.
Recognize that several different approaches to computing item difficulty are available. Follow the instructor's explanation re Objective 9.6. Follow the instructor's explanation re Objective 9.8. Read page 3 attached and follow the instructor's explanation re Objective 9.9. 128-130 re Objective 9.10.