Scientific Misconduct in Psychology: A Systematic Review of Prevalence Estimates and New Empirical Data

Spectacular cases of scientific misconduct have contributed to concerns about the validity of published results in psychology. In our systematic review, we identified 16 studies reporting prevalence estimates of scientific misconduct and questionable research practices (QRPs) in psychological research. Estimates from these studies varied due to differences in methods and scope. Unlike other disciplines, there was no reliable lower bound prevalence estimate of scientific misconduct based on identified cases available for psychology. Thus, we conducted an additional empirical investigation on the basis of retractions in the database PsycINFO. Our analyses showed that 0.82 per 10,000 journal articles in psychology were retracted due to scientific misconduct. Between the late 1990s and 2012, there was a steep increase. Articles retracted due to scientific misconduct were identified in 20 out of 22 PsycINFO subfields. These results show that measures aiming to reduce scientific misconduct should be promoted equally across all psychological subfields.