This dataset is taken from Thomason et al. (2014) who studied a group of 12 students who underwent a course in critical thinking. Their scores on the Logical Reasoning section of the Law School Aptitude Test (LSAT) were assesed before and after training.
lsat_scores
A list with two elements: pretrain
and posttrain
.
It is also found in Chapter 8 "The Paired Design" (pp 195 - 199) of Introduction to the New Statistics (Routledge, 2017), by Geoff Cumming and Robert Calin-Jageman.