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Post-training score minus pre-training score in (A) total recall, (B) semantic clustering, and (C) visual scanning in randomized and organized conditions. Positive values indicate improved performance. The error bars represent 95% confidence interval of the difference between pre- and post-training scores. Control, control group without training; PMR, progressive muscle relaxation; NGT, Nei Gong training. ∗p < 0.05; ∗∗p < 0.01 (paired samples t-test).
