Validity and Reliability

1. Reliability is important because teachers must make sure that test yield the scores consistently.

2. Validity is important because teachers must make sure that the test is measuring what it is intended to measure.

3. Reliability

3.1. Stability

3.1.1. give test twice to make sure that test results are similar.

3.2. Equivalence

3.3. Internal Consistency

3.3.1. Split-Half Method

3.3.2. Kuder-Richardson Method

4. Validity

4.1. Content Validity Evidence

4.1.1. Inspect questions on a test to make sure they correspond to the information needed to be tested

4.1.1.1. simpliest

4.2. Criterion-Related Validity Evidence

4.2.1. Concurrent

4.2.1.1. Measures at same time

4.2.2. Predictive

4.2.2.1. future behavior