“…In 1962, Cohen showed in a famous article that most research in abnormal social psychology was severely underpowered and actually led to the failure to reject null hypotheses which were actually false (Cohen, 1962). Following Cohen, many studies on statistical power have been conducted in psychological research (Brewer, 1972;Katzer and Sodt, 1973;Haase, 1974;Chase and Tucker, 1975;Kroll and Chase, 1975;Chase and Baran, 1976;Sawyer and Ball, 1981;Sedlmeier and Gigerenzer, 1989). The result of these surveys is alarming, because they point out that a large part of experimental research reveal effects that are actually false, due to statistical underpower.…”