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      Statistical power analyses using G*Power 3.1: tests for correlation and regression analyses.

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      Journal: Behavior Research Methods
      Keywords: Algorithms, Data Interpretation, Statistical, Linear Models, Regression Analysis, Software

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          Abstract

          G*Power is a free power analysis program for a variety of statistical tests. We present extensions and improvements of the version introduced by Faul, Erdfelder, Lang, and Buchner (2007) in the domain of correlation and regression analyses. In the new version, we have added procedures to analyze the power of tests based on (1) single-sample tetrachoric correlations, (2) comparisons of dependent correlations, (3) bivariate linear regression, (4) multiple linear regression based on the random predictor model, (5) logistic regression, and (6) Poisson regression. We describe these new features and provide a brief introduction to their scope and handling.

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          G*Power 3: A flexible statistical power analysis program for the social, behavioral, and biomedical sciences

          Franz Faul, Edgar Erdfelder, Albert-Georg Lang … (2007)
          G*Power (Erdfelder, Faul, & Buchner, 1996) was designed as a general stand-alone power analysis program for statistical tests commonly used in social and behavioral research. G*Power 3 is a major extension of, and improvement over, the previous versions. It runs on widely used computer platforms (i.e., Windows XP, Windows Vista, and Mac OS X 10.4) and covers many different statistical tests of the t, F, and chi2 test families. In addition, it includes power analyses for z tests and some exact tests. G*Power 3 provides improved effect size calculators and graphic options, supports both distribution-based and design-based input modes, and offers all types of power analyses in which users might be interested. Like its predecessors, G*Power 3 is free.
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            Tests for comparing elements of a correlation matrix.

            James H. Steiger (1980)
            Article 0 comments Cited 290 times – based on 0 reviews     Review now
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              A simple method of sample size calculation for linear and logistic regression

              F Y Hsieh, Daniel A. Bloch, Michael D Larsen (1998)
              A sample size calculation for logistic regression involves complicated formulae. This paper suggests use of sample size formulae for comparing means or for comparing proportions in order to calculate the required sample size for a simple logistic regression model. One can then adjust the required sample size for a multiple logistic regression model by a variance inflation factor. This method requires no assumption of low response probability in the logistic model as in a previous publication. One can similarly calculate the sample size for linear regression models. This paper also compares the accuracy of some existing sample-size software for logistic regression with computer power simulations. An example illustrates the methods.
              Article 0 comments Cited 118 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                PubMed ID:: 19897823
                DOI:: 10.3758/BRM.41.4.1149

                ScienceOpen disciplines: Chemistry
                Keywords: Algorithms,Data Interpretation, Statistical,Linear Models,Regression Analysis,Software
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                ScienceOpen disciplines: Chemistry
                Keywords: Algorithms, Data Interpretation, Statistical, Linear Models, Regression Analysis, Software

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