We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Cliff's Delta Calculator: A non-parametric effect size program for two groups of observations.
- Authors
Macbeth, Guillermo; Razumiejczyk, Eugenia; Ledesma, Rubén Daniel
- Abstract
The Cliff's Delta statistic is a non-parametric effect size measure that quantifies the amount of difference between two groups of observations beyond p-values interpretation. This measure can be understood as a useful complementary analysis for the corresponding hypothesis testing. During the last two decades the use of effect size measures has been strongly encouraged by methodologists and leading institutions of behavioral sciences. The aim of this contribution is to introduce the Cliff's Delta Calculator software that performs such analysis and offers some interpretation tips. Differences and similarities with the parametric case are analysed and illustrated. The implementation of this free program is fully described and compared with other calculators. Alternative algorithmic approaches are mathematically analysed and a basic linear algebra proof of its equivalence is formally presented. Two worked examples in cognitive psychology are commented. A visual interpretation of Cliff's Delta is suggested. Availability, installation and applications of the program are presented and discussed.
- Subjects
STATISTICAL hypothesis testing; COGNITIVE psychology research; PSYCHOMETRICS; DATA analysis; BEHAVIORAL research; NONPARAMETRIC statistics
- Publication
Universitas Psychologica, 2011, Vol 10, Issue 2, p545
- ISSN
1657-9267
- Publication type
Article