Validity and Reliability in Measurement

1. Validity

1.1. Content Validity Evidence

1.1.1. Useful requirement for a test but not a gurantee

1.1.2. Used to make sure test/assessment questions match the objectives/ content covered

1.2. Criterion Related Validity Evidence

1.2.1. Concurrent Criterion

1.2.1.1. Multiple measures administered and measured at the same time.

1.2.2. Predictive Validity

1.2.2.1. Predicts how well students will do in a similar future setting

1.2.2.2. involves time variable

1.3. Construct Validity Evidence

1.3.1. Theoretical support of idea that reflects a relationship between ideas

2. Reliability

2.1. Test-Retest

2.2. Alternative Form

2.3. Internal Consistency

2.3.1. Split Half

2.3.1.1. Split test into equal parts and compare results

2.3.2. Kuder-Richardson Concept

2.3.2.1. Measures how much each item with the test relates to the others