marginally significantp = 0.074
Further analysis revealed that the main effect of training comes from the post-test difference between trained and untrained complex problems [ t (33.73) = 2.12, p = 0.041, d = 0.47], while the difference was marginally significant in the pre-test [ t (33.24) = 1.84, p = 0.074, d = 0.41].