The idea
The classic claim is that interrupted tasks are recalled better than completed ones. Later research has not consistently supported that memory advantage; a 2025 meta-analysis found no overall advantage.
Why it matters
People do leave tasks unfinished, whatever the memory mechanism. Explicit saved state and a clear next step are more dependable than hoping an incomplete task stays on someone’s mind.
A real-world example
A learning tool preserves the last completed exercise and offers a clearly labeled resume link. It does not use persistent guilt-inducing reminders.
What this doesn’t mean
Do not present unfinished tasks as a guaranteed engagement technique. The tendency to resume an interrupted task, often called the Ovsiankina effect, is a separate claim.
Try this.
Save progress, explain what remains and let people choose whether to return. Treat this as support for interruption recovery, not a memory guarantee.
Sources & further reading
Our explanations and examples are original. These references provide the underlying research or design perspective.
- Zeigarnik, B. (1927). Das Behalten erledigter und unerledigter Handlungen.
- Ghibellini & Meier (2025). Interruption, recall and resumption: a meta-analysis of the Zeigarnik and Ovsiankina effects.