Cognitive Scaffold

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MENTAL MODEL · M3532

Selective Attention

Selective Attention
Learn & MetacognitionHigh supportCognitive Psychology
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Updated 2026-07-31

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INTRODUCTION

English translation pending.

CORE DEFINITION

A core construct in cognitive psychology describing how the brain processes only a subset of available stimuli while suppressing the remainder. Donald Broadbent's filter models and Colin Cherry's cocktail party studies established that attention operates as a limited-capacity channel. Attention is commonly modeled as a spotlight that can be aimed, narrowed, or split, and selection is driven both by current goals and by physical salience. The limit is structural rather than motivational: unattended information is largely lost rather than stored for later use, which is why failures of noticing are ordinary rather than exceptional.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Invisible Failure Audit: assume a colleague genuinely did not see the problem you consider obvious. - Multitasking Cost Check: name what gets dropped before committing to a parallel plan. - Salience Design: when a message is missed, fix the signal instead of blaming the receiver.

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Anchor fast decisions

Attention has finite capacity, so selection is competitive rather than additive. Stimuli matching current goals or standing out physically win the competition for processing, and everything else decays before reaching awareness. Because filtering happens early, the brain never forms a durable memory of the ignored material. The cocktail party effect shows the filter is not absolute: personally relevant signals such as one's own name can break through, which means the gate is tuned rather than closed.

MINIMUM ACTION

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Source support: Explicit

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