Pearson’s *r *isn’t the only game in town…

Name | Symbol | Characteristic of Variables |

Pearson’s Product Moment | r |
Both are continuous (interval or ratio) |

Rank Order | r | Both are rank (ordinal) |

Point-Biserial | rpbis |
One is continuous (interval or ratio) and one is nominal with two values |

Biserial | rbis |
Both are continuous, but one has been artificially broken down into nominal values. |

Phi | f | Both are nominal and each has two values. |

Contingency | C |
Both are nominal and each has more than two values. |

Tetrachoric | rt |
Both are continuous, but each has been artificially broken down into two nominal values. |

Eta | h | Both are continuous and are used to detect curvilinear relationships. |

Del Siegle, Ph.D.

Neag School of Education – University of Connecticut

del.siegle@uconn.edu

www.delsiegle.info

updated 2/24/2015