Using this App
Please cite as: Lakens, D., & Caldwell, A. R. (2019). Simulation-Based Power-Analysis for Factorial ANOVA Designs. https://doi.org/10.31234/osf.io/baxsf
This Shiny app is for performing 'exact' simuations of factorial experimental designs in order to estimate power for an ANOVA and follow-up pairwise comparisons. This app will not allow you to vary the standard deviations or the correlations in within-subjects designs. If you do need/want to violate these assumptions please use the ANOVA_power app.
Click here for the other appThe Design Tab
You must start with the Design tab in order to perform a power analysis. At this stage you must establish the parameters of the design (sample size, standard deviation, etc). *Please note the sample size must be greater than the product of the cells For example, 2b*2w = 4 and requires a sample size of at least 5 per cell. If this is entered incorrectly, then the 'Submit Design' button will be disabled. Once you click 'Submit Design' the design details will appear and you can continue onto the power analysis.
Exact Power Tab
In this tab, you will setup an *exact* simulation. All you can do at this stage is set the alpha level (default=.05) and decide the estimated marinal means analysis (optional)
Power curve Tab
In this tab, you can find your desired power (default = 90%) power across a range of sample sizes. All you need to do is set a minimum and maximum sample size. This tab will also allow you to download csv files including the power of ANOVA and estimated marginal means across a range of sample sizes.
Download your Simulation
Once your simulation is completed a button a button will appear on the sidebar to download a PDF
NEWS
Current updates to Superpower's Exact Shiny App
App uses the updated ANOVA_exact2 function. There are no longer sample size limtations for the function
Design Input
Specify the factorial design below
*Must be specified to continue*
*Must be specified to continue*