This add-in ingests estimates from an ordinary least squares report (produced by Fit Model) and saves a table of model effect estimates, F-ratios, p-values, and three measures of effect size as formula columns (Eta Squared, Partial Eta Squared, Omega Squared). If pairwise analyses are present with 'Ordered Difference' reports available, a combined data table of estimates including pairwise effect sizes (Cohen's d) will be generated. If no pairwise analyses are present this add-in will issue a prompt to add these to the selected report.
Instructions (after installing add-in):
Fit an ordinary least squares model using Analyze > Fit Model
Go to Add-Ins > Calculate Effect Sizes > From Least Squares Report (Fit Model)
If more than one least squares report is open, a dialog will appear to select which analysis to use
For models with a categorical factor:
If pairwise analyses (e.g. Student's t-test) and "Ordered Differences' reports are available, Cohen's d for available pairwise effects will be calculated and saved to a combined data table
If no pairwise analyses have been produced (or "Ordered Differences' reports have not been produced) a prompt will appear to add these analyses and calculate these effect sizes.
Table of model effects and effect sizes
If available, table of pairwise effect sizes
Overall model statistics are saved to tables as table variables.
This add-in provides estimated effect sizes for ordinary least squares models (models with random effects are not supported)
Effect Sizes Produced:
Model Effect Sizes:
Partial Eta Squared
Negative values of omega squared are possible and are automatically set to 0
Pairwise Effect Size:
v0.03 - Added Cohen's d calculation for pairwise differences, and dialog to produce pairwise analyses if not present
v0.04 - Added code to suppress prompt to add pairwise comparisons for models without categorical factor
v0.05 - Fixed defect for running on Windows (Fit Least Squares reports were not detected). Added support dialog for selecting from available Least Squares reports: