Dataset:   artedwards.dat

Source: C.A. Chambliss and A.J. Hartl (1987). "Efficacy of Edwards' 
Cognitive Shift Approach to Art Education," Studies in Art Education,
Vol. 28, #3, pp149-153

Description: Experiment to compare effects of 3 methods on improving
drawing:  Edwarts' Training Procedure (ET), a placebo control group
involving a sham (nonsensical) treatment (ST), and a waiting list
control group (WC). Scores are differences in drawing rating scores
(post tx - pre tx)

Variables/Columns:
Treatment  1-2
Sample size   5-6 
Mean score   9-12
SD          15-18