Blair Lehman Sidney K. D'Mello Amber Chauncey Strain Melissa Gross Allyson Dobbins Patricia S. Wallace Keith K. Millis Arthur C. Graesser Inducing and Tracking Confusion with Contradictions during Critical Thinking and Scientific Reasoning. 171-178 2011 AIED http://dx.doi.org/10.1007/978-3-642-21869-9_24 conf/aied/2011 db/conf/aied/aied2011.html#LehmanDSGDWMG11