Have you ever been accused of faking badly? Today, a WSJ front-pager looks at a psychology test, used increasingly by defendants in personal injury lawsuits, called the Fake Bad Scale. In hundreds of cases, says the story, expert witnesses have testified that the test provided evidence that plaintiffs were lying about their injuries. The test gained credibility recently after being endorsed by the Minnesota Multiphasic Personality Inventory.

But now psychologists and plaintiffs' lawyers claim that the Fake Bad Scale identifies...