This data set is an excerpt from Table 2 of Jacobson & Truax (1991).
sample_dataA CSV table containing the columns `ppid`, `pre` and `post` where `ppid` is a continuously incrementing list of unique integers, `pre` contains pretest values (floating-point) and `post` contains posttest values (floating-point too)
Jacobson, N. S., & Truax, P. (1991). Clinical Significance: A Statistical Approach to Defining Meaningful Change in Psychotherapy Research. Journal of Consulting and Clinical Psychology, 59, 12-19. <doi:10.1037/0022-006X.59.1.12>