Zeigarnik Effect

The observation that individuals have better memory for interrupted and incomplete tasks than for completed tasks.

Reference:

Zeigarnik, B. (1927). Das Behalten erledigter und unerledigter Handlungen [Retention of completed and uncompleted actions.]. Psychologische Forschung, 9, 1–85.

MacLeod, C. M. (2020). Zeigarnik and von Restorff: The memory effects and the stories behind them. Memory & Cognition, 48, 1073-1088. https://doi.org/10.3758/s13421-020-01033-5