In a blog post published last week, Timothy D. Wilson, a professor of psychology at the University of Virginia and the author of “Redirect: The Surprising New Science of Psychological Change,” declared that "the field has become preoccupied with prevention and error detection—negative psychology—at the expense of exploration and discovery." The evidence that psychology is beset with false positives is weak, according to Mr. Wilson, and he pointed instead to the danger of inept replications that serve only to damage "the reputation of the original research...