what is the reseach method use inolman, H., Orobio de Castro, B., & van Aken, M.A.G XXXXXXXXXXExperimental Study of the differential effects of playing versus watching violent video games on...

what is the reseach method use inolman, H., Orobio de Castro, B., & van Aken, M.A.G (2008). Experimental Study of the differential effects of playing versus watching violent video games on children’s aggressive behavior. Aggressive Behavior, 34, pp. 256-264.