Regarding accuracy, the intervention group demonstrated a highly significant improvement effect ( P < 0.001, Hedges’ g = 7.24), representing the largest effect size among all measures, indicating that the intervention significantly enhanced cognitive flexibility.
However, despite its relatively low statistical power (42.5%), the consistency observed in sensitivity analyses provides supporting evidence for this marginally significant result. 4 Discussion The results of this study showed that the experimental group showed significant improvement in performance on several cognitive task indicators after the intervention, forming a significant difference from the control group, especially in the reaction time and accuracy rate of the Stroop task, the reaction time of the 1-back and 2-back tasks, and the accuracy rate of the task-switching task; the effect of the intervention was particularly significant.