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)
    1. So, graph your scores on a scatter plot to determine if you should take the time to analyze the data
    2. Compute a correlation between the two tests
    3. 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.