How good are you at dancing or singing? Without any sort of objective measure, a common method to try and determine our ability is by using peer comparison. We watch those around us participating in similar activities and estimate our relative performance. The only problem, as discovered by research psychologists David Dunning and Justin Kruger, is that when we use peer comparison to judge our own performance we are most often wrong, and sometimes by a significant margin.
Richard Feenstra is an educational psychologist, with a focus on judgment and decision making.
Bobby Hoffman is the author of "Hack Your Motivation" and a professor of educational psychology at the University of Central Florida.