Validity And Reliability
by christine williams
1. A valid test measures what it is supposed to measure.
2. Content Validity Evidence
2.1. Makes sure test items match objectives
3. Test- retest estimates of reliability
3.1. Same test is given twice at different intervals for determination
4. Alternate- form estimates of reliability
4.1. Eliminates memory & practice with test-retest
5. Validity
6. Christine Williams
7. Reliability refers to the stability of a test score over repeated administrations. A reliable test will yield stable scores over repeated administrations, assuming the trait being measured has not changed.
8. Kudor-Richardson method
8.1. Commonalities of items in a test
9. Internal consistency estimates of reliability
9.1. Split halves
9.1.1. Split test into two equal halves and look at the connection
9.2. Odd -even
9.2.1. Odd test items in half and even in half
9.3. Makes sure test items match objectives
10. Criterion-related validity evidence
10.1. Scores are associated with external measure
10.2. Predictive
10.2.1. Predicts future behavior of the examinee
10.3. Concurrent
10.3.1. Estimates the validity of a new test