3. 6. Cognitive Flexibility Performance
Mixed-measures ANOVAs with the within-subject factor of Time (pre-test
and post-test) and the between-subject factor of Group (control group
vs. stress group) were computed for the interference effect on WCST
perseverative errors. No significant main effects emerged for Time,F (1, 61) = 0.06, p = .816, \(\eta_{p}^{2}\) <
0.01 or Group, F (1, 61) = 0.13, p = .716, \(\eta_{p}^{2}\)< 0.01. However, a significant Time × Group interaction was
observed, F (1, 61) = 7.71, p = .007, \(\eta_{p}^{2}\) =
0.11 (see Figure 5C). Simple effects analyses (Bonferroni corrected)
revealed that the post-test score in the control group was significantly
lower than the pre-test score (p = .036).