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MENTAL MODEL · M8305

Variation Theory

Variation Theory
SystemsmediumSystems Theory
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Updated 2026-08-11

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INTRODUCTION

English translation pending.

CORE DEFINITION

Variation theory was developed by Ference Marton and colleagues from phenomenographic research into how people experience the same phenomenon differently. Its core proposition is that discernment requires contrast: a learner cannot notice a feature unless it varies against a background that stays constant, so teaching should systematically vary non-essential features while holding the essential one fixed. The key qualification is design discipline, since variation that also changes the essential feature teaches nothing, and too much variation at once overwhelms the contrast.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Use essence naming: state exactly which feature must stay constant across all the examples. - Use variation sequence: present examples that differ only in their non-essential features. - Use contrast prompt: ask learners what stayed the same before you name the rule.

anchor

Anchor fast decisions

Attention is limited, and a feature that never changes provides no signal that it is a feature. Varying the incidental dimensions makes them visible as incidental, while the constant dimension stands out as what defines the case. Learners who see instances differing only in detail are forced to discard the surface and retain the invariant, which is the representation that transfers. Too much variation defeats this, because the learner can no longer tell which difference carries the meaning, so the design of the contrast decides whether the concept is extracted.

MINIMUM ACTION

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Source support: Explicit

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    eric.ed.govhttps://eric.ed.gov/?id=EJ1438438ZH · Explicit
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