20 August 2012 - Release 3.1.5 Mac and WindowsFixed a problem in the test of equality of two variances. The drawers now appear correctly after clicking on the Determine button. 12 September 2012 - Release 3.1.5.1 MacFixed a problem with the effect size drawers of ANOVA: Fixed effects. MacFixed a problem in Fisher’s exact test.The problem did not occur when the effect size was specified in terms of Two probabilities. 5 January 2010 - Release 3.1.2 Mac and WindowsRenamed the Repetitions parameter in repeated measures procedures to Number of measurements (Repetitions was misleading because it incorrectly suggested that the first measurement would not be counted).Fixed a problem in the sensitivity analysis of the logistic regression procedure: There was an error if Odds ratio was chosen as the effect size. Changing the number of covariates now correctly leads to the appropriate change in the denominator degrees of freedom. 22 June 2011 - Release 3.1.3 Mac and WindowsFixed a bug in the ANCOVA module. The problem did not occur with post hoc analyses. 3 July 2012 - Release 3.1.4 Mac and WindowsAdded an options dialog to the repeated-measures ANOVA which allows a more flexible specification of effect sizes.Fixed a problem in calculating the sample size for Fisher's exact test.24 January 2008 - Release 3.0.10 Mac and WindowsFixed a problem in the X-Y plot for a range of values for Generic F tests. 29 June 2009 - Release 3.1 WindowsAdded procedures to analyze the power of tests referring to single correlations based on the tetrachoric model, comparisons of dependent correlations, bivariate linear regression, multiple linear regression based on the random predictor model, logistic regression, and Poisson regression. 08 December 2009 - Release 3.1.1 WindowsRe-enabled options dialog for Correlation: Bivariate normal model. 16 December 2009 - Release 3.1 MacAdded procedures to analyze the power of tests for single correlations based on the tetrachoric model, comparisons of dependent correlations, bivariate linear regression, multiple linear regression based on the random predictor model, logistic regression, and Poisson regression. This option has been available for some time in the Windows version (see View menu).
Statistical Software Buy Update Immediately IfAll power routines based on the t distribution were affected by this bug. 8 October 2007 - Release 3.0.7 Mac and WindowsFixed a bug in the function calculating the CDF of the noncentral t-distribution that occasionally led to (obviously) wrong values when p was very close to 1. Please update immediately if you installed version 3.0.7. 10 October 2007 - Release 3.0.8 Mac and WindowsFixed a serious bug in the CDF routine of the noncentral t distribution introduced in the bugfix release 3.0.7. WindowsFixed some minor GUI problems (buttons had German titles button in file dialog named “open” instead of “save”).Fixed problems with distribution plots (plots were sometimes not appropriately clipped when copied or saved as metafile drawing glitches with some very steep curves).The file dialog shown when saving graphs or protocols now uses the user's home directory (myDocuments) as defaults directory. 22 January 2008 - Release 3.0.9 MacEliminated the brushed metal look for better readability under Mac OS X 10.5.26 June 2007 - Release 3.0.4 Mac and WindowsFixed a bug in the Power Plot (opened using the X-Y-plot for a range of values button) for F Tests, Multiple Regression: Special (R2 increase). Sometimes some of the variables were not correctly set in the plot procedure which led to erroneous values in the graphs and the associated tables. 03 July 2007 - Release 3.0.5 Mac and WindowsFixed a bug in the Power Plot (opened using the X-Y-plot for a range of values button) for F tests, MANOVA: Global effects and F Tests, MANOVA: Special effects and interactions. When alpha was very small, this bug could cause G*Power to crash. The default has been changed to 1 plot.Corrected some parsing errors in the calculator (in the Mac version, this only concerns text input in normal input fields).Corrected a label in the effect size drawer for ANOVA: Fixed effects, omnibus, one-way. The t distribution PDF routine is now more robust for very large degrees of freedom by explicitly using a normal approximation in these cases.When the Power Plot window was first opened by pressing the X-Y plot for a range of values button, the default was to show 4 plots simultaneously. Power now checkes for invalid null effect sizes in a priori analyses. 1 March 2007 - Release 3.0.3 Mac and Windows:Fixed a bug in the X-Y plots for a range of values for F Tests, ANOVA: Fixed effects, special, main effects and interactions. Sometimes the mouse pointer appeared to be "glued" to the window and the movement could not be stopped properly. WindowsFixed a problem with moving the main window when the effect size drawer is open. Besides enabling (restricted) resizability this option initially shrinks the window to a size that fits into a 800 x 600 screen. To do this choose "Resizable Window" in the View menu of the Graph window. There are also corresponding entries in the View menu.The Graph window can now be made resizable. To hide/show these sub-views press F4 (plot/protocol) and F5 (test/analysis), respectively, while the main window is active. WindowsAdded options mainly intended to make G*Power usable with low resolution displays (800 x 600 pixels)The distribution/protocol view and the test/analysis selection view in the main window can be hidden temporarily to save space. 28 February 2007 - Release 3.0.2 Mac and WindowsFixed a probem with tooltips for effect size conventions which were not always shown. Is windows or mac better for audio recording- First release of version 3.0. This problem has been fixed.Updated installation instruction. 15 January 2007 - Release 3.0.1 WindowsEffect size calculation for t Tests, Difference between two indepent means (two groups), case n1 = n2: The wrong means—those of case n1 ≠ n2—were used to calcultate the effect size. MacFixed a cosmetic problem when drawing “extreme” central and non-central distributions.
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