Validity / Reliability

1. Content Validity

1.1. Does the test measure instructional objectives?

1.2. Measures if a test looks valid versus the difficulty of the reading or answers to the test.

1.3. This is the simplest way to measure instructional objectives. Content validity only measures what the students know about the information they have learned.

2. Criterion Based Validity

2.1. Concurrent Criterion Related Validity: Yields a numeric value, a correlation coefficient.

2.2. Predictive Validity Evidence: Refers to how well the test takers will do in the future using a predictive validity coefficient.

2.2.1. New node

2.3. This is useful for determining

3. Test/Retest

3.1. Using test and retest reliabilities, a test is given and then given again to measure it's reliability. If a test does well after being tested and rested, it is a reliable and, therefore stable test, depending on the length of time in between the tests. If there is a long amount of time between the tests, the results are less stable.

4. Alternative Forms

4.1. Using alternative forms of a test can predict whether the students know the answers to the test rather than just guessing or estimating their answers. The length of time between using the testing forms is also an indicator of how effective the tests are.