Rank-biserial correlation

  title={Rank-biserial correlation},
  author={Edward E. Cureton},
  • E. Cureton
  • Published 1 September 1956
  • Mathematics
  • Psychometrika
A formula is developed for the correlation between a ranking (possibly including ties) and a dichotomy, with limits which are always ±1. This formula is shown to be equivalent both to Kendall'sτ and Spearman'sρ. 
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