In this study, the investigators will be examining the effects of repetitive transcranial magnetic stimulation (rTMS) on executive function deficits in individuals with autism spectrum disorder. Half of the participants will be chosen by chance to receive active rTMS stimulation while half will be chosen by chance to receive sham rTMS. Sham rTMS will feel the same as active rTMS only there will be no direct brain stimulation. This is necessary to ensure that active rTMS is efficacious in the enhancement of executive function in individuals with autism spectrum disorder. Based on results from a recently published pilot study, the investigators propose that active rTMS treatment will result in a significant improvement in working memory performance compared to sham rTMS treatment.