The Zeigarnik Effect in Relationships
Unfinished relationships are said to linger because the mind clings to unfinished business. The study behind that claim tested lab tasks, and its memory half did not replicate.
Answer to the question
Does the Zeigarnik effect explain why unfinished relationships stay with you?
Not as it is usually told. Bluma Zeigarnik's 1927 study tested short laboratory tasks, not people, and a 2025 meta-analysis by Romain Ghibellini and Beat Meier found no memory advantage for interrupted tasks across 38 publications. What did hold up is the urge to go back to something left unfinished, which people did about two times in three.
Key takeaways
- Bluma Zeigarnik's 1927 paper tested 164 people individually on short tasks, some finished and some interrupted. It did not study relationships.
- On her measure, interrupted tasks were recalled about 90 per cent better than finished ones.
- A 2025 meta-analysis by Romain Ghibellini and Beat Meier, at the University of Bern, found no memory advantage for interrupted tasks across 38 publications and judged Zeigarnik's original values inflated.
- The same meta-analysis found that people resumed interrupted tasks 67 per cent of the time across 21 publications. That is the Ovsiankina effect, and it was stronger when the task was attractive.
- In 2011, E. J. Masicampo and Roy F. Baumeister found that a specific plan for an unfinished goal removed the intrusive thoughts it caused. None of the studies cited here tests a breakup.
The claim goes like this. A relationship that ended without an explanation, a conversation that stopped mid-sentence, a person who simply stopped replying: these stay with you because the mind holds on to unfinished business. The name attached to it is the Zeigarnik effect, and "the Zeigarnik effect in love" now circulates as if it were a finding.
It is worth separating what was tested from what has been borrowed.
What did Zeigarnik actually test?
Bluma Zeigarnik ran her experiments at the Psychological Institute of the University of Berlin, in Kurt Lewin's laboratory, and published them in Psychologische Forschung in 1927. She tested 164 people one at a time, students and teachers as well as children, and ran two group experiments. Each person worked through a run of short tasks. Some were allowed to finish; others were stopped partway and moved on. Afterwards each person listed as many tasks as they could remember.
On her measure, the interrupted tasks were recalled about 90 per cent better than the finished ones, close to twice as often. She explained the result as a kind of tension: starting a task creates a need to complete it, and the need stays active until the task is done.
The material was short tasks in a laboratory. Nobody in the study was interrupted in a relationship. Applying the result to a breakup is an extrapolation, not something the paper reports.
Does the memory claim hold up?
Not well. Romain Ghibellini and Beat Meier pooled the published experiments in a 2025 meta-analysis in Humanities and Social Sciences Communications. Across 38 publications, the ratio of average recall for interrupted to completed tasks was 0.99, meaning no difference, with or without Zeigarnik's own data. In the 14 publications that reported it, interrupted tasks made up 49.43 per cent of the tasks people recalled, close to an even split. Across the eight publications where an effect size could be computed, the average was very small.
The authors judged Zeigarnik's original values inflated and suggested her result may have depended on conditions common in laboratories of the 1920s, such as experimenters with strong authority and participants deeply absorbed in their tasks.
So the version of the idea that says an unfinished relationship is remembered more vividly because it is unfinished rests on the half of the effect that did not hold, even for simple tasks.
What does hold up: the urge to go back
The same meta-analysis tested a sister effect from the same series of studies. Maria Ovsiankina reported in 1928 that people who are interrupted tend to go back and finish what they were doing, now called the Ovsiankina effect. Ghibellini and Meier found a resumption rate of 67 per cent across 21 publications, and 66.79 per cent with Ovsiankina's own data left out. Resumption was more likely when the interrupted task was attractive to the person doing it.
That is the part with evidence behind it, and it is a claim about behaviour, not memory: interrupted, people tend to resume. Whether a relationship behaves like an interrupted task is not tested by any study cited here. If it does, the evidenced reading is a pull to return to something you wanted to continue, not a sharper memory of it. And a rate of two in three leaves a third who did not go back, even to a laboratory task.
Does making a plan help?
For unfinished goals, yes, in one line of studies. E. J. Masicampo and Roy F. Baumeister, at Florida State University, reported in 2011 that unfinished goals produced intrusive thoughts during an unrelated task. In their first study, with 69 undergraduates, 65.2 per cent of the unfinished-task group reported mind-wandering, against 33.3 per cent of those who had made a plan. A specific plan, saying how, when and where the goal would be met, removed the intrusions. Listing possible actions without committing to one did not.
Those studies measured intrusive thoughts, accessibility and task performance, not feelings about a former partner. What they suggest is that an open loop is quietened by a decided next step of your own, rather than by waiting for someone else to close it. Whether that carries over to the end of a relationship has not been tested in the work cited here.
Is it rumination or a need for closure instead?
Possibly, but this article cannot settle it. Neither rumination nor the need for closure is measured in the studies above, and none of them looked at relationships. The honest position is that "the Zeigarnik effect" is a borrowed label for an experience people clearly have, and that the research behind the label does not explain it.
The verdict
The popular claim that the Zeigarnik effect explains why an unfinished relationship lingers does not have evidence behind it. Zeigarnik studied short tasks, the memory advantage she reported did not survive a meta-analysis of the experiments that followed, and no study cited here tests it on people. The nearest evidenced mechanism is the Ovsiankina effect, the urge to resume, and the nearest evidenced remedy for intrusive thoughts about an unfinished goal is a specific plan. The same distinction runs through The Zeigarnik Effect at the Credits, on why cliffhangers keep people watching.
Frequently asked questions
What is the Zeigarnik effect in simple terms?
The claim that interrupted or unfinished tasks are remembered better than finished ones. It comes from Bluma Zeigarnik's 1927 study. A 2025 meta-analysis of 38 publications found no such memory advantage.
Is the Zeigarnik effect real in love and relationships?
There is no evidence for it in the studies cited here. Zeigarnik tested short laboratory tasks, and none of the work cited tests relationships.
What is the difference between the Zeigarnik and Ovsiankina effects?
The Zeigarnik effect is a claim about memory. The Ovsiankina effect is a claim about behaviour: the tendency to resume an interrupted task. The 2025 meta-analysis supported the Ovsiankina effect, at about 67 per cent resumption, and not the memory claim.
Why do I keep thinking about something unfinished?
Masicampo and Baumeister (2011) found that unfinished goals produced intrusive thoughts, and that making a specific plan for how, when and where to finish removed them.
Does the Zeigarnik effect explain ghosting?
No study cited here tests ghosting. Calling it the Zeigarnik effect applies a memory claim that did not hold for tasks to a situation it was never tested on.
Sources
Zeigarnik, B. (1927). Das Behalten erledigter und unerledigter Handlungen. Psychologische Forschung, 9, 1-85. doi:10.1007/BF02409755
Ovsiankina, M. (1928). Die Wiederaufnahme unterbrochener Handlungen. Psychologische Forschung, 11, 302-379. doi:10.1007/BF00410261
Ghibellini, R., & Meier, B. (2025). Interruption, recall and resumption: a meta-analysis of the Zeigarnik and Ovsiankina effects. Humanities and Social Sciences Communications, 12, 962. doi:10.1057/s41599-025-05000-w
Masicampo, E. J., & Baumeister, R. F. (2011). Consider it done! Plan making can eliminate the cognitive effects of unfulfilled goals. Journal of Personality and Social Psychology, 101(4), 667-683. doi:10.1037/a0024192