The Zeigarnik effect is the psychological tendency for people to remember unfinished or interrupted tasks better than completed ones. It is named for the Lithuanian-Soviet psychologist Bluma Zeigarnik, who conducted pioneering research into the phenomenon after observing that waiters could recall unpaid orders in far more detail than orders that had already been settled, and it is understood as an extension of Gestalt psychology principles from perception into cognitive processes more broadly.
Facts
Core ClaimPeople remember unfinished or interrupted tasks better than completed tasks. 1 FAQs
Has the Zeigarnik effect held up when other researchers have tested it?
Only partly: several replications and a 2025 meta-analysis found no memory advantage for unfinished tasks.
The reliability of the effect has been a matter of some controversy. Several later studies in other countries that tried to replicate Zeigarnik's experiment failed to find significant differences in recall between finished and interrupted tasks. A 2025 systematic review and meta-analysis of research on the Zeigarnik and Ovsiankina effects found no memory advantage for unfinished tasks, but did find a general tendency to resume tasks, and concluded that the Zeigarnik effect lacks universal validity.
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Source Wikipedia: Zeigarnik effect
Sources
1. Wikipedia: Zeigarnik effect
Wikimedia FoundationOverview section, sentence on the 1927 publication in Psychologische Forschung
The research report was published in 1927, in the journal Psychologische Forschung.
Lead section, sentence defining unfinished task recall
people remember unfinished or interrupted tasks better than completed tasks
Lead paragraph
In psychology, the Zeigarnik effect (named after Lithuanian-Soviet psychologist Bluma Zeigarnik) postulates that people remember unfinished or interrupted tasks better than completed tasks.
In Approach: Cognitivism, Lead paragraph, in-approach
In Gestalt psychology, the Zeigarnik effect has been used to demonstrate the general presence of Gestalt phenomena: not just appearing as perceptual effects, but also present in cognition.
In Group: Memory Models and Memory Effects, Lead
In psychology, the Zeigarnik effect (named after Lithuanian-Soviet psychologist Bluma Zeigarnik) postulates that people remember unfinished or interrupted tasks better than completed tasks.
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