REGRESSION TOWARD THE MEAN IN PSYCHOLOGICAL TESTING AND THE REOCCURRENCE PROBABILITY OF EXTREME SCORES
心理测验中的趋中回归与超常分数重现概率

The regression toward the mean and other related characteristics in psychological testing were examined. The relations of reoccurrence probability of extreme scores to the distribution of true score, reliability, and the cutoff value of extreme scores were also scrutinized. Results showed that the regression toward the mean effect is larger when the reliability is lower or when the cutoff value is more extreme. For normally distributed data, the reoccurrence probability is related to reliability exponentially and to cutoff values linearly. Methods to avoid the regression toward the mean artifact were also generally discussed.