What makes a test “useful”?
A test is useful if it helps someone make decisions more effectively than without it. Tests are found useful to measure progress in school classes, how much teenagers and adults know about State driving rules and how much intelligence and background knowledge is had by persons applying for college and for the Armed services. They are found useful by employers when hiring for private industry and by the government, such as the Postal Service, which uses the Civil Service Examination to screen postal worker applicants. Some tests are more useful than others. For example, one test for depression may be quite reliable and valid but only provide one score for overall depression, another test may also provide separate score for aspects of depression, such as suicidal tendencies and personal problem areas. The second test may be more useful because it provides this added detail. I built my test for depression to provide many scores for separate aspects of depression, including suicidal tenden
