1. Allison, D. B., Silverstein, J. M., &Gorman, B. S. (1996). Power, sample size estimation, and early stopping rules. In R. D. Franklin, D. B. Allison, & B. S. Gorman (Eds.),Design and analysis of singlecase research (pp. 335–371). Mahwah, NJ: Erlbaum.
2. Arnold, D. H., &Harvey, E. A. (1998). Data monitoring: A hypothesistesting approach for treatment-outcome research.Journal of Consulting & Clinical Psychology,66, 1030–1035.
3. Becker, R. A., Chambers, J. M., &Wilks, A. R. (1988).The new S language: A programming environment for data analysis and graphics. New York: Chapman & Hall.
4. Cohen, J. (1988).Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale, NJ: Erlbaum.
5. Fiske, D. W., &Jones, L. V. (1954). Sequential analysis in psychological research.Psychological Bulletin,51, 264–275.