Pre- vs post-training comparison of cognitive functions
POSITIVE
The effect of experimental and control training was evaluated for particular tasks. The profile of changes in Difference in z scores (post-training minus pre-training) for participants in the two training groups. The z scores for both post-training and pre-training were referred to pre-training performance of all participants (across both groups). The following formula was implemented: difference in z scores = [(X2—M1)/SD1] −[(X1—M1)/SD1], where X1 and X2 refer to an individual score for particular test in pre-training and post-training assessment respectively, M1 and SD1 refer to mean and standard deviation for all participants in this test in pre-training assessment. Positive values (right side from the 0 point) correspond to improved performance. Negative values correspond to worsened performance (left side from the 0 point). The significant differences between 