نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار گروه روانشناسی، دانشگاه تربیت مدرس، تهران، ایران
2 استاد گروه روان شناسی ، دانشگاه شاهد، تهران، ایران.
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Appropriate sample size calculation, its justification, and power analysis are too
difficult in psychological sciences. The process of sample size calculation and power
analysis using statistical formulas, especially without any background is too difficult.
The informativeness of research depends on this justification. The more collected
data, the more informativeness according to its inferential goals. In this paper, basic
concepts have been discussed and then, G*Power software was briefly introduced
for sample size determinations and power analysis. Briefly, 3 practical examples of
the sample size calculations using this software were finally introduced. This
software supports sample size calculation and power analysis for various statistical
methods including exact test, t-tests, F-tests, Chi-Square tests, and Z-tests, each of
these family tests includes many statistical tests. This software is user-friendly and
useful software for estimating sample size and power analysis in psychological
science research. This paper provides insight for a psychological researcher and it
will make the researcher able to apply this software to other statistical tests
کلیدواژهها [English]