Validity and Realiability

1. Validity

1.1. Does the test measure what it is supposed to measure?

2. Validity Test Methods

2.1. Test should measure instructional objectives.

2.2. Test should reflect the state academic standards.

2.3. Test should do the job it was designed to do.

3. Realiability

3.1. A test is reliability if it consistently yields the same scores or test data.

4. Realiability Test Methods

4.1. Retest. Test is given twice, correlation between the two sets of scores is determined.

4.1.1. Sub Idea 1

4.1.2. Sub Idea 2

4.2. Alternate Forms. Two equivalent forms of a test that can be used to obtain an estimate of the reliability of the scores.

4.3. Internal Consistency. Items should be correlated with each other.

5. Reference. Kubiszyn, T. & Borich, G. (2010). Educational testing & measurement: classroom application and practice (9th ed). John Wiley & Sons, Inc. Hoboken, NJ.