The purpose of the present study is twofold: (a) to compare the validation of percentage of nonoverlapping data approach and percentage of data points exceeding the median of baseline phase (PEM) approach, and (b) to demonstrate application of the PEM approach in conducting a quantitative synthesis of single-subject research investigating the effectiveness of self-control. The results show that the PEM had higher Spearman correlation with original authors' judgment than PND did. The results of applying the PEM approach to synthesize the effect of self-control training on academic and social behavior showed that the treatment was highly or at least moderately effective.

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The purpose of the present study is twofold: (a) to test the repeatability of the superiority of the percentage of data points exceeding the median of the baseline phase (PEM) approach over the percentage of nonoverlapping data (PND) approach for the synthetic analysis of single-subject researches, and (b) to demonstrate the application of the PEM approach in conducting a quantitative synthesis of single -subject researches, which investigated the effectiveness of interventions on academic behaviors. The analyzed studies were obtained through a computer-assisted search of the relevant databases and a hand search of the relevant behavior analysis journals. The major finding demonstrates the repeatability of the superiority of the PEM approach over that of the PND. Key words: PEM approach (the percentage of data points exceeding the median of the baseline phase); PND approach (the percentage of nonoverlapping data); Synthetic analysis of single-subject researches. *Wu, S. S. (2001). Using a comprehensive reading strategies program to improve the reading comprehension skills of students with low reading comprehension.