This may be one of the more difficult modules for you. You will learn this, and the next two modules will not be nearly as difficult. We will cover reliability and usability in future modules. We want evidence that the scores actually reflect whatever we expect them to measure.
Validity is a matter of degree.
We judge the validity to be high, moderate, or low. Validity is specific to some particular use or interpretation - Can only answer the question of validity in relation to a given specific task for a given population of examinees. Validity is a unitary concept 4. There are five major types of validity. First, you create or locate your list of behavioral objectives.