How doorways and walls shape our long-term memories
Passing through a doorway weakens our ability to remember the order of events that happened on either side of it, even when the time and distance between them are controlled.
Source
The role of spatial boundaries in shaping long-term event representations
What they did
In three experiments, college students navigated virtual rooms on a computer, categorizing 144 everyday objects. In each room, they encountered objects sequentially, meaning some pairs were experienced in the same room while other pairs were separated by a doorway. Afterward, memory was tested in three ways, with a focus on determining whether a cued object came immediately before or after another.
What they found
Across all tests, participants were significantly better at remembering the correct order of objects when both were encountered within the same room compared to when they were in adjacent rooms. This spatial boundary effect persisted even after controlling for physical distance, walking speed, and the amount of time participants spent viewing each object. Interestingly, participants performed at chance when asked to identify the exact room in which an object had appeared, suggesting that spatial boundaries shape memory structure automatically without requiring conscious recall of the environment.
The limits
What it doesn't show
While the study shows that spatial boundaries disrupt sequential memory, it does not explain the exact brain mechanisms involved, although the authors hypothesize a role for the medial temporal lobe. The study was conducted entirely in virtual reality environments on desktop screens, which may not capture the full physical and vestibular experiences of navigating real-world spaces. Additionally, because the memory tests occurred shortly after the encoding phase, the findings do not clarify how these event boundaries affect memory retrieval over days, weeks, or years. Finally, the experiments only tested healthy young adults, so the results may not generalize to older populations or those with cognitive impairments.
Key terms
- Episodic memory
- The ability to recall and mentally re-experience personally experienced events situated in a specific time and place.
- Event segmentation
- The automatic cognitive process by which people divide continuous sensory experiences into distinct, meaningful events.
- Location updating effect
- A short-term memory phenomenon where walking through a doorway causes people to forget information from the room they just left.
- Situation models
- Cognitive representations of a real or described environment that help people understand and keep track of a narrative.
- Medial temporal lobe
- A region of the brain, including the hippocampus, that is critical for forming long-term memories and processing spatial information.
- Contextual drift
- The gradual and spontaneous change of mental context representations over time, used to explain temporal memory patterns.
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Quiz yourself
According to Event Segmentation Theory, what signals the perception of an event boundary?
Common questions
Did the physical distance between objects explain why people remembered within-room pairs better?
No. In later experiments, the researchers made the rooms larger so that the physical and walking path distances were actually longer within the same room than between adjacent rooms, yet memory was still better for the within-room items.
Did participants simply forget the objects because they spent less time looking at them when moving between rooms?
No. The researchers ran a control experiment where objects were replaced with question marks until participants walked right up to them, ensuring that the visual exposure and viewing times were identical across conditions.
Does this mean we must explicitly remember the rooms to order the objects?
Interestingly, no. Participants could not reliably identify which virtual room an object had been in, performing at a chance level on that task, which suggests that the spatial boundaries shaped their memory automatically without conscious recall of the room's appearance.
How did the researchers computationally model this effect?
They adapted a model where memories are linked to a shifting background context signal, showing that accelerated context changes at doorways naturally simulate the observed memory drop.
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