not-yet-known not-yet-known not-yet-known unknown Experimental procedures Participants were asked to sit in front of a computer monitor and press the correct key when they saw a square on the monitor. Concurrent with the main SRTT test, participants also received the tDCS intervention corresponding to their group (Hardwick & Celnik, 2014). Several studies have suggested that simultaneous application of tDCS and SRTT can significantly enhance motor behavior (Hanning et al. , 2023). Therefore, in the present study, the tDCS intervention was administered concurrently with SRTT (Figure 2). Two researchers were involved in this study. The first one was responsible for pre- and post-intervention assessments of outcome measures, who was blinded to the participant’s grouping. The second researcher was responsible for applying the interventions. Participants were fully unaware of the interventions in the other groups, and they were also kept blind to whether they were receiving sham or active tDCS sessions. To evaluate the integrity of blinding, participants were asked to guess the type of intervention (active or sham) after each session. Their responses regarding the nature of the tDCS intervention they received were then compared for the active and sham conditions using a Pearson’s chi-squared test (χ2) to assess blinding integrity.