Cognitive Scaffold

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MENTAL MODEL · M8167

Dual-Task Interference Assessment

Dual-Task Interference Assessment
Learn & MetacognitionmediumCognitive Psychology
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Updated 2026-08-11

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INTRODUCTION

English translation pending.

CORE DEFINITION

The assessment measures performance on a task alone and then with a second task added, using the decrement as an estimate of interference. If the two tasks interfere, they compete for the same attentional or working-memory resource and cannot be safely combined; if they do not, they draw on separate resources and can run in parallel, which is the difference between listening to music while driving and texting while driving.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Baseline alone: measure each task's performance by itself. - Add the second: measure the decrement when both run at once. - Read the channels: separate shared central resources from distinct peripheral ones.

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Anchor fast decisions

Attention and working memory are finite and shared, so two tasks drawing on the same resource compete for it, and the deficit appears in whichever task is less automatic. Practice changes the picture by automatizing one task and removing it from the competition, which is why some combinations improve with training while others never do.

MINIMUM ACTION

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Practice this model in one real situation:

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Source support: Explicit

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    doi.orghttps://doi.org/10.1016/j.gerinurse.2025.103771ZH · Explicit
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