In this quasi-experimental study by Brady, Seli, and Rosenthal (2013), the authors demonstrated that through the use of “clickers” they could increase metacognition and exam performance. For more information please see the reference below.
Brady, M., Seli, H., & Rosenthal, J. (2013). “Clickers” and metacognition: A quasi-experimental comparative study about metacognitive self-regulation and use of electronic feedback devices. Computers & Education, 65, 56-63. doi:10.1016/j.compedu.2013.02.001