%0 Journal Article %T Task complexity as a driver for collaborative learning efficiency: The collective working‐memory effect %A Kirschner, Femke %A Paas, Fred %A Kirschner, Paul A. %J Applied Cognitive Psychology %V 25 %N 4 %P 615-624 %@ 0888-4080 %D 2011-07-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve