Is This Test Good? How To Evaluate Psychological Tests

Psychological tests have become increasingly popular and influential. There are tests of intelligence and personality, along with tests designed to diagnose various mental disorders. Given the way that these tests are used (e.g., college admission and clinical treatment), it is critical that we understand how to evaluate the quality of a test.

But what makes a test good or bad?

The simplest way to answer this question is to examine two questions:

Does the test measure something accurately an...