“…In a problem-posing context, we consider that a student exhibits cognitive flexibility when the following three conditions are fulfilled (Pelczer, Singer, & Voica, 2013a): the student poses different new problems starting from a given input (i.e., cognitive variety), generates new proposals that are far from the starting item (i.e., cognitive novelty), and he/she is able to change his/her mental frame related to the proposal, if necessary, in generating and solving problems (i.e., change in cognitive framing).…”