Re: [R] Point-biserial correlation

From: William Revelle <>
Date: Wed, 23 Jul 2008 23:05:15 -0500

At 10:23 PM +0200 7/23/08, Tobias Verbeke wrote:
>Angelo Scozzarella wrote:
>>what the command for the point-biserial correlation?
>Have a look at the polycor package by John Fox.

A point-biserial correlation is just a Pearson correlation where one of the variables is dichotomous. Thus, the command is just the normal cor function.

The polycor package will give (among other things) the biserial correlation (a correlation between a dichotomous variable and a continuous variable with the assumption that the dichotomous reflects a normal that was artificially dichotomized).


> mailing list
>PLEASE do read the posting guide
>and provide commented, minimal, self-contained, reproducible code.

William Revelle
Department of Psychology   
Northwestern University
Attend  ISSID/ARP:2009     

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Received on Thu 24 Jul 2008 - 04:08:40 GMT

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