Various Types of Validity & Relability

1. Reference:Kubiszyn, Tom. (2012). Educational Testing and Measurement: Classroom Application and Practice, 10th Edition.

2. Validity

2.1. Content Validity Evidence

2.1.1. CVE answers questions

2.1.2. CVE inspects test questions

2.2. Criterion Related-Correlated test scores

2.2.1. Concurrent

2.2.1.1. measures

2.2.2. Predictive

2.2.2.1. two sets of test score coefficient

2.3. Construct

2.3.1. Expected test results

3. Reliability

3.1. Methods of Estimating Reliabilty

3.1.1. test-retest

3.1.2. alternative form

3.1.3. Internal consistency

3.1.3.1. split halves

3.1.3.2. odd-even reliablity

3.2. Interpreting Reliability Coefficients

3.2.1. Group Variablity

3.2.2. Scoring reliablity

3.2.3. Test length affects test scoring reliability

3.2.4. Item difficulty affects test reliability