50: Construct Validity: New Test vs. Known Test
Construct Validity
- When comparing a new test to a known test, you are computing construct validity (determining if your measurement is measuring the same thing)
- So, graph your scores on a scatter plot to determine if you should take the time to analyze the data
- Compute a correlation between the two tests
- If your test is valid, and assuming research estimates that 15-16% of students require additional assistance in mathematics. Determine the cut off score for your new test.