I am the teaching assistant for EPSY 8262 Statistical Methods II: Regression and the General Linear Model, taught by Dr. Jeffrey D. Long. 
is the statistical software that we use in the course. Installing and using R can be difficult at first, so I’ve gathered some helpful resources for students and others who are getting started.
- Installing R video tutorials by Milton Mayfield
- Statistics with R video tutorials by Mohammad Ehsanul Karim
- Contributed documentation in many languages
- R Reference Card by Tom Short
- Simple R by John Verzani
- Practical Regression and Anova using R by Julian Faraway
- Using R for Data Analysis and Graphics by John Maindonald
- R-help search engine (highly recommended) by Seyed Reza Jafarzadeh, which searches the mailing list archives.
- For spatial statistics (not pertinent to EPSY 8262), I created an R-sig-Geo search engine to retrieve information from those archives.
- R Commander graphical user interface (GUI) by John Fox
- Data Analysts Captivated by R’s Power, a New York Times article by Ashlee Vance