Cyrus K. Foroughi, Samuel S. Monfort, Martin Paczynski, Patrick E. McKnight, and P. M. Greenwood, «Placebo Effects in Cognitive Training», Proceedings of the National Academy of Sciences 113, no. 27 (2016): 7470–74; Lucinda S. Spaulding, Mark P. Mostert, and Andrea P. Beam, «Is Brain Gym® an Effective Educational Intervention?», Exceptionality 18, no. 1 (2010): 18–30; Jennifer Stephenson, «Best Practice? Advice Provided to Teachers About the Use of Brain Gym® in Australian Schools», Australian Journal of Education 53, no. 2 (2009): 109–24.