Types of Validity and Reliability

1. Content Validity Evidence

1.1. Does the test measure the instructional objectives?

2. Criterion related Validity Evidence

2.1. Concurrent - correlating test scores with a criterion measure selected at the same time - comparing a new test with an established one

2.2. Predictive - correlating test scores with a criterion measure collected after a period of time has passes - shows how well the test predicts some future behavior

3. Construct Validity Evidence

3.1. its relationship to other information corresponds will with some theory - any information that lets you know whether results from the test correspond to what you'd expect

4. Internal Consistency Reliablilty

4.1. Split halves - split the test into two equivalent halves and determine the correlation between them

4.2. Odd - Even Reliability - split the test into odd numbers and even numbers and determine the correlation between them

5. Test-Retest Reliability

5.1. Test is given twice in short time period and the correlation between the two sets of scores is determined

6. Alternative Form Reliability

6.1. two equivalent forms of a test are given in a short time period and the correlation is determined