Various forms of evidence can be used to establish the validity of scores on an instrument.Which of the following forms is a source of validity evidence that you might use?
A)Evidence based on the test scores at two different times
B)Evidence based on the ratings of multiple observers
C)Evidence based on the consistency of the test scores
D)Evidence based on the relationship of test scores to external variables

Question

Quizplus · Accepted Answer

Evidence based on the relationship of test scores to external variables (also known as criterion-related evidence) is the best source of validity evidence because it shows whether the test scores are related to other measures or outcomes. For example, if a test claims to measure intelligence, then it should be related to other measures of intelligence or academic achievement. This type of evidence is more valuable than evidence based on test scores at two different times (which may only show reliability), evidence based on the ratings of multiple observers (which may only show inter-rater reliability), or evidence based on the consistency of the test scores (which may only show internal consistency).

Various Forms of Evidence Can Be Used to Establish the Validity