The Danger of Testing by Selecting Controlled Subsets, with Applications to Spoken-Word Recognition

@inproceedings{LibenNowell2019TheDO,
  title={The Danger of Testing by Selecting Controlled Subsets, with Applications to Spoken-Word Recognition},
  author={David Liben-Nowell and Julia F Strand and Alexa Sharp and Tom Wexler and Kevin A Woods},
  year={2019}
}
When examining the effects of a continuous variable x on an outcome y , a researcher might choose to dichotomize on x , dividing the population into two sets—low x and high x —and testing whether these two subpopulations differ with respect to y . Dichotomization has long been known to incur a cost in statistical power, but there remain circumstances in which it is appealing: an experimenter might use it to control for confounding covariates through subset selection, by carefully choosing a… CONTINUE READING

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