1. J. Cohen, Statistical Power Analysis for the Behavioral Sciences, 2nd ed. (Erlbaum, Hillsdale, NJ, 1988). This is the source of the system of power analysis described here; the power values and sample sizes of the illustrations derive from this book's tables.
2. J. Neyman and E.S. Pearson, On the use and interpretation of certain test criteria for purposes of statistical inference, Biometrika, 20A, 175-240, 263-294 (1928);
3. J. Neyman and E.S. Pearson, On the problem of the most efficient tests of statistical hypotheses, Transactions of the Royal Society of London Series A, 231, 289-337 (1933).
4. For an article-length treatment of sample size determination using the .80 convention and a = .01,05, and .10, see J. Cohen, A power primer, Psychological Bulletin (in press). A useful alternative treatment is offered in H.C. Kraemer and S. Thiemann, How Many Subjects? Statistical Power Analysis in Research (Sage, Newbury Park, CA, 1987).