Most Average Facial Appearance Effect

Principle

Faces closer to population averages are perceived as more attractive. • Attributed to evolution, cognitive prototypes, and facial symmetry. • Used in marketing via composite faces of target groups. • Symmetry and averageness indicate health and familiarity.

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Further Readings
https://en.wikipedia.org/wiki/Koinophilia

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von Restorff Effect

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Performance Load

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Layering

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Mental Model

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Aesthetic-Usability Effect

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Gutenberg Diagram

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