Format Effects on Recall
Friendly data frame has 30 rows and 2 columns.
The data are from an experiment on subjects' ability to remember words
based on the presentation format.
Friendly, M. and Franklin, P. (1980) Interactive presentation in multitrial free recall. Memory and Cognition 8 265--270 [Personal communication from M. Friendly].
Fox, J. (2008) Applied Regression Analysis and Generalized Linear Models, Second Edition. Sage. Fox, J. and Weisberg, S. (2011) An R Companion to Applied Regression, Second Edition, Sage.