The doorway effect is a psychological phenomenon where walking through a physical or virtual doorway causes short-term memory loss and makes you forget what you were doing or thinking.
Why It Happens
Event boundaries: Your brain breaks continuous time and activity into distinct episodes or chapters.
Context updating: Crossing a threshold acts as a mental reset or "event boundary," causing your brain to archive the previous thought to free up energy for the new environment.
Spatial navigation: The brain shifts its focus to process the new surroundings, which can push your previous intention out of your working memory.
How to Prevent It
Say it out loud: Speak your goal before you move.
Visualize: Picture the task you need to complete in the next room.
Carry an item: Take a related object with you to maintain context.