Dear R-users,
a new R package has been released named orddom.
This package provides ordinal estimates as alternatives to independent
or paired group mean comparisons, especially for Cliffs delta
statistics. It provides basic parameters for various robust tests of
stochastic equality with ordinally scaled variables.
For two sets of data, ordinal comparison estimates are calculated such as
- Cliff's delta (for which a Cohen's d effect size estimate, along with
CIs are also calculated), (cf. Cliff, 1993; 1996; Long, Feng, & Cliff,
2003; Feng & Cliff, 2004; Feng, 2007);
- the Common Language CL effect size or Probability of Superiority (PS)
(Grissom, 1994; Grissom & Kim, 2005) estimate; and
- estimates of Vargha and Delaneys A as stochastic superiority (Vargha
& Delaney, 1998, 2000; Delaney & Vargha, 2002).
References and details can be found in the package help manual.
The package is available as of now via
http://cran.r-project.org/web/packages/orddom/index.html
Your comments and suggestions are appreciated; please send your email to
jens.rogmann _AT_ uni-hamburg.de
Thank you,
Kind regards
Jens J. Rogmann
---------------
Dr. J. J. Rogmann
Universität Hamburg
Fakultaet EPB / ABK
Dept of Psychology
Von-Melle-Park 5/IV
D-20146 Hamburg
Germany
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