The ability to add two single digits has nothing do with history.įor many constructs, or variables that are artificial or difficult to measure, the concept of validity becomes more complex. On a test designed to measure knowledge of American History, this question becomes completely invalid.
It becomes less valid as a measurement of advanced addition because as it addresses some required knowledge for addition, it does not represent all of knowledge required for an advanced understanding of addition. The test question “1 + 1 = _” is certainly a valid basic addition question because it is truly measuring a student’s ability to perform basic addition. Validity refers to the degree in which our test or other measuring device is truly measuring what we intended it to measure. After all, we are relying on the results to show support or a lack of support for our theory and if the data collection methods are erroneous, the data we analyze will also be erroneous.
Just as we would not use a math test to assess verbal skills, we would not want to use a measuring device for research that was not truly measuring what we purport it to measure. Whenever a test or other measuring device is used as part of the data collection process, the validity and reliability of that test is important. Share Tweet Share tumblr reddit Test Validity and Reliability
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