Effect Size Generator
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This programme (or "program" for our American visitors)
has two major utilities
and a collection of smaller utilities (links are
screenshots or example reports in pdf format): |
- It will compute
effect size estimates for use in
meta-analyses. It will compute Cohen's d effect size
estimates, apply Hedges'
Adjustment for sample size (to Cohen's d) and also provide
Hedges' ĝ effect size estimate. It will also provide any confidence
intervals for these derived effect sizes. It
also contains a full help file.
- It will conduct a
meta-analysis on effect sizes
that have been saved to a database.
This includes providing mean effect sizes, standard deviation and 95%
confidence intervals of the effect size, z score distributions of the studies
included and a suite of Fail-Safe N
statistics. Meta-analyses can even be conducted by measure type, and weighted
mean (by number of participants) and weighted standard deviations with
appropriate 95% cut-offs are also computed.
Other features include the ability to :
- estimate effect size interactions on repeated measure analysis;
- estimate f2 effect size estimates for both multiple and
hierarchical regressions;
- obtain any confidence intervals for effect sizes;
- estimate standard deviations;
- conduct t-tests
and z-tests
on entered data;
- compute confidence intervals around mean (any confidence interval!);
- conduct 2x2, 2x3 and 3x3 Chi Square analyses;
- test for a statistical difference between two correlations, effect sizes
or probability levels;
- conduct a priori
power analyses;
- convert different
statistics to and from effect sizes (e.g., to d and r from chi
square, t-test, r, d, ANOVA, Hedges' ĝ, etc.);
- convert statistical figures (e.g., t-test number) to a probability level;
- export meta-analysis database to Microsoft Excel;
- create
meta-analysis report;
- tests of heterogeneity (Q and I-Squared statistics);
- save files and open saved files
of raw data;
- generate a printed one page
summary report to keep in your records;
- use a built-in
screen capture device;
- use an internal
calculator.
Key Benefits
- Easy to use interface
- Full complement of analyses performed at the push of a button
- Full help file (including statistical explanations)
- Less than 10% the cost of rival products!
Product history is available
here.
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