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MENTAL MODEL · M8055

Collaborative Inhibition

Collaborative Inhibition
Learn & MetacognitionHigh supportCognitive Science
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Updated 2026-08-11

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INTRODUCTION

English translation pending.

CORE DEFINITION

A robust finding in memory research: collaborative recall produces fewer unique items than nominal groups, formed by pooling the recall of the same number of people working alone. The deficit arises from retrieval disruption, since hearing others' contributions interferes with each person's own retrieval strategy, not from a lack of stored information. The key qualification is that the effect concerns the generation of items, not their evaluation: groups are often better than individuals at recognizing which items are correct, so the deficit is specific to recall.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Sequence design: have people record their own items before any group discussion begins. - Pooling step: merge the individually written lists rather than relying on spoken recall. - Task separation: use the group for judging and refining items, and individuals for generating them.

anchor

Anchor fast decisions

Each person retrieves information along idiosyncratic associative routes, and hearing another person's contribution redirects retrieval toward what was just said. That redirection interrupts the original route, so items that would have been recovered through it are never reached. Because the interference affects retrieval rather than storage, the information remains available and reappears when the same people recall alone, which is what the nominal group comparison demonstrates.

MINIMUM ACTION

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Source support: Explicit

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