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Kristopher J. Preacher

Kristopher J. Preacher

MacCallum, R. C., Zhang, S., Preacher, K. J., & Rucker, D. D. (2002). On the practice of dichotomization of quantitative variables. *Psychological Methods*, *7*, 19-40.

The following dataset is in text format. N = 50. The variables are continuous X, continuous Y, dichotomized X, and dichotomized Y.

Example using one independent variable

The following dataset is in text format. N = 100. The variables are continuous X1, continuous X2, Y, dichotomized X1, dichotomized X2, standardized X1, standardized X2, and the product of the standardized X's.

Example using two independent variables