Support the creation of quests in MOOC to motivate learners to complete tasks:

"The Zeigarnik Effect is the tendency to experience intrusive thoughts about an objective that was once pursued and left incomplete (Baumeister & Bushman, 2008, pg. 122). The automatic system signals the conscious mind, which may be focused on new goals, that a previous activity was left incomplete. It seems to be human nature to finish what we start and, if it is not finished, we experience dissonance.

A study done by Greist-Bousquet and Schiffman (1992) provided evidence for the Zeigarnik Effect. In this paper, the authors stated that there is a tendency or “need” to complete a task once it has been initiated and the lack of closure that stems from an unfinished task promotes some continued task related cognitive effort. The cognitive effort that comes with these intrusive thoughts of the unfinished task is terminated only once the person returns to complete the task."