Often when people learn about effect sizes, one of the first things they ask is “what software do I need to do this?”

Many effect size indexes can be calculated on the back of an envelope or using nothing more than a Spreadsheet.

Other effect size indexes are generated automatically by statistical programs such as SPSS or STATA.

Still, for those of you who want something flashy, a set of seven easy to use calculators can be found on the Resources page (or just click here to be taken straight to the calculators).

This entry was posted on Monday, May 31st, 2010 at 1:55 am and is filed under effect size, effect size calculators. You can follow any responses to this entry through the RSS 2.0 feed.
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“The primary product of a research inquiry is one or more measures of effect size, not p values.”
~ Jacob Cohen

“Statistical significance is the least interesting thing about the results. You should describe the results in terms of measures of magnitude – not just, does a treatment affect people, but how much does it affect them.”
~ Gene Glass