On the practice of dichotomization of quantitative variables.

@article{Maccallum2002OnTP,
  title={On the practice of dichotomization of quantitative variables.},
  author={Robert C Maccallum and Shaobo Zhang and Kristopher J Preacher and Derek D Rucker},
  journal={Psychological methods},
  year={2002},
  volume={7 1},
  pages={19-40}
}
The authors examine the practice of dichotomization of quantitative measures, wherein relationships among variables are examined after 1 or more variables have been converted to dichotomous variables by splitting the sample at some point on the scale(s) of measurement. A common form of dichotomization is the median split, where the independent variable is split at the median to form high and low groups, which are then compared with respect to their means on the dependent variable. The… CONTINUE READING
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