SimDesign (version 2.18)

SimAnova: Function for decomposing the simulation into ANOVA-based effect sizes

Description

Given the results from a simulation with runSimulation form an ANOVA table (without p-values) with effect sizes based on the eta-squared statistic. These results provide approximate indications of observable simulation effects, therefore these ANOVA-based results are generally useful as exploratory rather than inferential tools.

Usage

SimAnova(formula, dat, subset = NULL, rates = TRUE)

Arguments

formula

an R formula generally of a form suitable for lm or aov. However, if the dependent variable (left size of the equation) is omitted then all the dependent variables in the simulation will be used and the result will return a list of analyses

dat

an object returned from runSimulation of class 'SimDesign'

subset

an optional argument to be passed to subset with the same name. Used to subset the results object while preserving the associated attributes

rates

logical; does the dependent variable consist of rates (e.g., returned from ECR or EDR)? Default is TRUE, which will use the logit of the DV to help stabilize the proportion-based summary statistics when computing the parameters and effect sizes

Author

Phil Chalmers

References

Chalmers, R. P., & Adkins, M. C. (2020). Writing Effective and Reliable Monte Carlo Simulations with the SimDesign Package. The Quantitative Methods for Psychology, 16(4), 248-280. tools:::Rd_expr_doi("10.20982/tqmp.16.4.p248")

Sigal, M. J., & Chalmers, R. P. (2016). Play it again: Teaching statistics with Monte Carlo simulation. Journal of Statistics Education, 24(3), 136-156. tools:::Rd_expr_doi("10.1080/10691898.2016.1246953")

Examples

data(BF_sim)

# all results (not usually good to mix Power and Type I results together)
SimAnova(alpha.05.F ~ (groups_equal + distribution)^2, BF_sim)

# only use anova for Type I error conditions
SimAnova(alpha.05.F ~ (groups_equal + distribution)^2, BF_sim, subset = var_ratio == 1)

# run all DVs at once using the same formula
SimAnova(~ groups_equal * distribution, BF_sim, subset = var_ratio == 1)