Arnon Hershkovitz Michael Wixon Ryan Shaun Joazeiro de Baker Janice D. Gobert Michael Sao Pedro Carelessness and Goal Orientation in a Science Microworld. 462-465 2011 AIED http://dx.doi.org/10.1007/978-3-642-21869-9_70 conf/aied/2011 db/conf/aied/aied2011.html#HershkovitzWBGP11