Objectives
This study aims to investigate the effect of a short-term mindfulness training program on participants’ performance on response inhibition and identify the neural correlates of the error-related event-related potential (ERP) during the task.
Method
A total of 61 participants were included in the statistical analyses. Three types of 15-min short-term interventions over 5 days were employed: (1) mindfulness practice (mindfulness group), (2) relaxation guidance (active control group), and (3) neutral materials (control group). Response inhibition performance was measured by stop-signal task (SST) before and after each intervention and concurrent neural activity was assessed at the post-program phase.
Results
A significant interaction between the assessment and intervention on the stop-signal reaction time was indicated (F(2, 58)=5.14, p=0.009, \({\eta}_{\textrm{partial}}^2\)=0.15). Specifically, participants in the control group showed significantly worse performance in SST while those in the mindfulness group showed a marginally significant better performance in SST after the intervention. The event-related potentials during post-program stop-signal task were analyzed with 53 participants and revealed significant differences in error positivity amplitude (Pe) of the no-go errors in SST between the groups (F(2,50)=3.72, p=0.031, \({\eta}_{\textrm{partial}}^2\)=0.13). Post-hoc t-tests indicated that the mindfulness group’s Pe amplitude was marginally higher than that of the other two groups.
Conclusions
The present work indicates that the short-term mindfulness training had a positive effect on response inhibition, and the changes in error-related ERP (Pe) following errors may be associated with this positive effect. The results provide insight into the association between mindfulness and response inhibition.
Preregistration
This study is not preregistered.