Reliability vs. Validity

1. Test-Retest Reliability

1.1. Changes are likely to take place within the students which alter test scores

1.1.1. Changes are not likely to affected greatly by within student error

1.2. Lowered score reliability may be the result of new learning

2. Alternate Forms Reliability

2.1. Two different forms of the same test given to the same group at the same time.

2.2. Effects within student error are negligible

3. Content Validity

3.1. Matches or fits instructional objectives

3.2. Aligned with academic state standards

4. Criterion-Related Validity

4.1. Scores form a test are correlated to external criterion

4.1.1. Concurrent

4.1.1.1. Measures can be adminstered at the same time

4.1.2. Predective

4.1.2.1. How well the test predicts the behaviors of the examinees