Published Online: 30 JAN 2010
Copyright © 2010 John Wiley & Sons, Inc. All rights reserved.
Corsini Encyclopedia of Psychology
How to Cite
Wearden, S. 2010. Phi Coefficient. Corsini Encyclopedia of Psychology. 1.
- Published Online: 30 JAN 2010
The phi (φ) coefficient was proposed by George Utney Yule in 1912 as an index of association between two dichotomous variables. The φ statistic is particularly useful to many research workers because it is the familiar product-moment correlation when computed for data from a bivariate binomial distribution. When such data are organized in a fourfold table, the coefficient is most easily computed as
- two sample comparisons;