Psychology says people who feel compelled to finish every puzzle they start may be responding to the same psychological desire for resolution that researchers call the need for cognitive closure

The need for cognitive closure describes a psychological trait driving task completion. This trait influences how individuals approach uncertain situations and make decisions. Research shows higher need for closure leads to greater effort when tasks require sustained mental work. Completing puzzles and solving problems provides a satisfying sense of resolution. This psychological motivation helps explain why unfinished tasks feel compelling.