G*Power: Statistical Power Analyses for Windows and Mac
G*Power is a tool to compute statistical power analyses for many different t tests, F tests, χ2 tests,z tests and some exact tests. G*Power can also be used to compute effect sizes and to display graphically the results of power analyses.
Agreement:
By downloading G*Power 3 you
automatically agree to the following terms of use:
(1) G*Power 3 is free for all users.
Commercial distribution is strictly prohibited.
(2) G*Power 3 is distributed exclusively
from this website:
http://www.psycho.uni-duesseldorf.de/abteilungen/aap/gpower3
If you wish to distribute G*Power in some
other way, then you need to seek permission from the authors. Please send an
e-mail to
gpower-feedback@uni-duesseldorf.de
in which you specify how and for what
purpose you intend to distribute G*Power 3.
(3) Although considerable effort has been
put into program development and evaluation, there is no warranty whatsoever.
Users are kindly asked to report possible bugs and difficulties in program
handling by sending an e-mail to
gpower-feedback@uni-duesseldorf.de.
Please
note:
If you use G*Power for your research,
then we would appreciate if you would include the following reference to the
program in the papers in which you publish your results:
Faul, F., Erdfelder, E., Lang, A.-G.
& Buchner, A. (2007). G*Power 3: A flexible statistical power analysis program
for the social, behavioral, and biomedical sciences. Behavior Research Methods, 39, 175-191.
In this paper we describe G*Power 3 and its improvements over the
previous version using a number of examples. We provide details on the
algorithms that are used, and we present the relevant parameters for all tests
covered by G*Power 3. A
preprint of this paper is available at
http://www.psycho.uni-duesseldorf.de/abteilungen/aap/gpower3/download-and-register.
Register:
If you want us to inform you about
updates of G*Power, then we suggest that you let us know your e-mail address:
https://mail.rz.uni-duesseldorf.de/mailman-lists/listinfo/register-gpower
We will not use your e-mail address for
other purposes.
