The prevalence of false confessions in experimental laboratory simulations: A meta-analysis.

We assessed experimental false confession studies using a meta-analysis to evaluate the prevalence of false confessions across methodologies and several moderator variables. False confessions were more likely in typing task studies than in collaborative or individual cheating studies. In typing studies, speed of typing did not affect false confession rates, but placement of the forbidden key in locations that rendered errors less plausible lowered the false confession rates. False-evidence ploys increased the likelihood of false confessions. We explore implications for courts, expert witnesses, scholars, and police interrogators.