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Related Experiment Video

Updated: Dec 18, 2025

Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
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Age-Related Differences in the Uncanny Valley Effect.

Yun-Chen Tu1, Sung-En Chien1, Su-Ling Yeh2,3,4,5,6

  • 1Department of Psychology, National Taiwan University, Taipei, Taiwan.

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Older adults do not experience the uncanny valley effect (UVE) with robots; they prefer humanlike designs. This finding is crucial for developing assistive robots tailored to older populations.

Keywords:
Age differencesOlder adultsRobot acceptanceUncanny valley

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Area of Science:

  • Robotics
  • Human-Computer Interaction
  • Gerontology

Background:

  • Global caregiving labor shortages due to aging populations necessitate assistive robots.
  • Older adults exhibit lower robot acceptance than younger adults, highlighting the need to enhance their acceptance.
  • The uncanny valley effect (UVE), where near-humanlike robots elicit negative reactions, is primarily studied in younger populations.

Purpose of the Study:

  • To investigate age-related variations in the uncanny valley effect (UVE).
  • To determine if a robot's appearance influences acceptance for service or companionship roles across different age groups.

Main Methods:

  • An online questionnaire study involved 255 participants across three age groups: younger (18-39), middle-aged (40-59), and older (60-87).
  • Participants evaluated 83 robot images, assessing impressions and intention of use for service or companionship roles.

Main Results:

  • The uncanny valley effect (UVE) was observed in younger and middle-aged adults.
  • Older adults did not exhibit the UVE, showing a consistent preference for humanlike robots irrespective of function.
  • Robot appearance significantly impacted acceptance, particularly for older adults who favored humanlike designs.

Conclusions:

  • Assistive robot design should consider age-specific responses to the uncanny valley effect (UVE).
  • Customizing robot appearance based on the target age group is recommended for improved acceptance and integration of assistive robots.