Cognitive Scaffold

Preparing your thinking workspace

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MENTAL MODEL · M2252

The Doorway Effect

The Doorway Effect
Learn & MetacognitionHigh supportCognitive Psychology
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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

Why do you walk into a room and suddenly forget what you came for? Because "passing through a door" (a change in physical environment) is perceived by the brain as an "event boundary." The brain assumes that the information from the old scene is no longer useful, so it performs a "purge" operation, leading to a loss of short-term memory. - Scaffolding role: The cognitive cost of context switching. This explains why multitasking (frequently switching between different apps or meeting rooms) makes you less effective. Every time you switch contexts, your brain performs a "purge-reload" cycle. The secret to staying focused is to reduce the number of context switches.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

The cognitive cost of context switching. This explains why multitasking (frequently switching between different apps or meeting rooms) makes you less effective. Every time you switch contexts, your brain performs a "purge-reload" cycle. The secret to staying focused is to reduce the number of context switches.

anchor

Anchor fast decisions

When passing through a door from one room to another, you may suddenly forget what you intended to do; the change in environment interrupts the event representation.

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Source support: Explicit

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    en.wikipedia.orghttps://en.wikipedia.org/wiki/Event_perceptionZH · Explicit
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