Cognitive Scaffold

Preparing your thinking workspace

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MENTAL MODEL · M4430

Mona Lisa Effect

Mona Lisa Effect
BehaviormediumPsychology
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Updated 2026-08-11

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INTRODUCTION

English translation pending.

CORE DEFINITION

A perceptual phenomenon in portrait perception. When a painted figure's gaze is directed straight ahead at approximately zero degrees, the direction of the gaze appears constant from any viewing position, so the figure seems to watch the viewer move. The effect depends on the geometry of the depicted eyes and disappears once the gaze is directed to the side. It has been applied in interface and avatar design.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Check the geometry: ask whether a cue actually points at you or is simply directed forward - Resist self-reference: treat a look, a comment, or a post as a general gesture rather than a message aimed at you - Design gaze: use a direct gaze to create engagement and an averted gaze to reduce pressure

anchor

Anchor fast decisions

A gaze directed straight ahead points at every position in the room simultaneously, because the direction of the depicted eyes does not vary with the viewer's location. The perceiver's default assumption is that being looked at means being looked at by someone, so the constant direction is read as tracking. The effect is a property of the picture's geometry.

MINIMUM ACTION

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Source support: Explicit

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