In psychology, the Zeigarnik effect states that people remember uncompleted or interrupted tasks better than completed tasks (this effect should not be confused with the Ovsiankina effect[19]).
https://en.wikipedia.org/wiki/Bluma_Zeigarnik#Zeigarnik_effect
Found via a Daryl Talks Games episode:
https://www.youtube.com/watch?v=GIDc_g7hydY
