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Related Experiment Video

Updated: May 15, 2026

Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues

Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues

Published on: June 3, 2013

Developmental processes in face perception.

Christoph D Dahl¹, Malte J Rasch, Masaki Tomonaga

¹Primate Research Institute, Kyoto University, Section Language and Intelligence, Inuyama, Aichi, Japan. dahl@pri.kyoto-u.ac.jp

Scientific Reports

|January 11, 2013

Summary

This summary is machine-generated.

Young chimpanzees recognize chimpanzee faces better due to early developmental processes. Older chimpanzees recognize human faces better, showing the impact of lifelong experience on face recognition.

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Area of Science:

Developmental psychology
Cognitive neuroscience
Primatology

Background:

Understanding face recognition development is crucial.
Distinguishing between early (experience-expectant) and late (lifetime experience) developmental components is challenging.
Chimpanzees offer a unique model due to lifelong exposure to non-conspecific faces.

Purpose of the Study:

To disentangle the contributions of early and late developmental components in face recognition.
To investigate how experience shapes face processing across the lifespan in chimpanzees.
To model the developmental trajectory of face recognition.

Main Methods:

Comparative face recognition tasks with chimpanzees of varying ages.
Assessing discrimination abilities for conspecific (chimpanzee) and non-conspecific (human) faces.
Computational modeling to simulate developmental components.

Main Results:

Young chimpanzees showed an advantage in discriminating chimpanzee faces over human faces.
Older chimpanzees demonstrated an advantage in discriminating human faces over chimpanzee faces.
Results indicate a shift from early, experience-expectant processing to late, experience-dependent processing.

Conclusions:

Early developmental mechanisms prioritize conspecific face recognition.
Lifelong exposure to specific faces (e.g., human faces in captivity) shapes face recognition abilities over time.
A dual-component model effectively describes face recognition development.