Additional cautionary notes about the Pearson's correlation coefficient

Zvi Maimon*, Adi Raveh, Gur Mosheiov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


In this paper we draw attention to two usually-neglected problems with the use of the Pearson's correlation coefficient for ordinal scores. We refer to the questions of substantial differences between the marginal distributions of the two variables to be correlated, and the number of ties on each one of the distributions or on both. Finally, we propose a correction factor for the Pearson's correlation coefficient when the number of ties is large. Some empirical examples are given in order to demonstrate these points.

Original languageAmerican English
Pages (from-to)313-325
Number of pages13
JournalQuality and Quantity
Issue number4
StatePublished - Dec 1986


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