Zeigarnik / Ovsiankina effect
Unfinished tasks create a pull to return and complete them.
Where it applies
Three of the eight page areas.
How to use it
Four ways to use it, and one to avoid.
- Keep the basket persistent across devices.
- Show “pick up where you left off” on the homepage.
- Save progress in quizzes and builders.
- Link abandoned-basket reminders straight back to the saved basket.
- Avoid: sending abandoned-basket emails or texts without consent or the soft opt-in, as they are likely to count as marketing under PECR.
What the research found
People tend to resume interrupted tasks, but don’t remember them better.
Interrupted tasks were resumed about 67% of the time.
The 2025 meta-analysis (59 publications) found no memory advantage for unfinished tasks (Zeigarnik) but a general tendency to resume them (Ovsiankina): about 67% of interrupted tasks were resumed. Resumption is the part relevant to abandoned baskets. The studies are lab tasks, not shopping.
Key research
Three sources, each checked.
Last reviewed
Ghibellini & Meier (2025)Meta-analysis Interruption, recall and resumption: a meta-analysis of the Zeigarnik and Ovsiankina effects Humanities & Social Sciences Communications Read the source Ovsiankina (1928) Untersuchungen zur Handlungs- und Affektpsychologie. VI. Die Wiederaufnahme unterbrochener Handlungen Psychologische Forschung Read the source Zeigarnik (1927) Das Behalten erledigter und unerledigter Handlungen Psychologische Forschung Read the source
Before you use it · UK law
Abandoned-basket emails and texts are likely to count as marketing under PECR, so send them only with consent or where the soft opt-in applies, and include an opt-out every time.
This is simply a pointer to check, not legal advice. Seek legal advice before you put this principle into action.