Participants will complete task A followed by task B, establishing baseline skill. Tasks will be recorded and scored retroactively, blinded to group allocation, to quantify time and error scores. Participants will be computer randomized to receive sham or active tDCS. Participants will perform the two FLS tasks in an interleaved manner (ABAB), a paradigm suggested to enhance laparoscopic skill acquisition, with eight training repetitions of each task. Following the final training block, the tDCS electrodes will be removed, and a final task evaluation will be performed for both task A and B. The Purdue Pegboard Test (PPT) will be performed at baseline and post-training to examine unilateral hand function, serving as a safety measure. Six weeks following the training the participants will return to assess retention of laparoscopic skill, with a single repetition of task A and B. Emerging evidence suggests that a significant decay in laparoscopic skill is present six weeks following training. The amount of laparoscopic practice between the training day and follow-up will be factored for residents, to ensure that standard training remains uninterrupted.