**Psychological Statistics**, and kindly contributed to R-bloggers)

This is a quick follow up to my earlier post that discussed how to graph CIs for within-subjects (repeated measures) ANOVA designs. My forthcoming book Serious stats describes how to do this for between-subjects designs (a much simpler problem). The blog that accompanies the book now has a post summarizing the main options and explaining how to plot difference-adjusted CIs (95% CIs constructed so that non-overlapping intervals correspond to a statistically significant difference between means at *p* < .05). In addition, the post includes R functions to calculate and plot difference-adjusted CIs (though the calculations are not difficult to reproduce by hand).

UPDATE: I’ve now added functions for two-tiered CIs for between-subjects designs on the book blog. More generally my functions for the book, CIs for ANOVA and a few other things are all available here. I plan to update these functions regularly to add functionality and deal with any undocumented features.

**leave a comment**for the author, please follow the link and comment on their blog:

**Psychological Statistics**.

R-bloggers.com offers

**daily e-mail updates**about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series, trading) and more...