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Statistical software and programs (or their links), R-scripts, spreadsheets, with documentation and examples (preferably linked to a lay summary and/or tutorial in another part of the site).

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Effect size calculator
Excel spreadsheet to calculate standardized effect sizes such as d and r - created by David B. Wilson
On-line meta analysis calculator
A useful tool for the calculation of effect sizes and to perform a simple meta-analysis
R package for power analysis
Various functions for calculating effect sizes and statistical power see:
Collection of phylogenetic programs
Tools that you may need when you do a comparative study
R functions to put confidence interval on d'
R functions to put a confidence interval on d'
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