Avoidance of novelty contributes to the uncanny valley

Kyoshiro Sasaki, Keiko Ihaya, Yuki Yamada

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


A hypothesis suggests that objects with a high degree of visual similarity to real humans trigger negative impressions (i.e., the uncanny valley). Previous studies have suggested that difficulty in object categorization elicits negative emotional reactions to enable the avoidance of potential threats. The present study further investigated this categorization-difficulty hypothesis. In an experiment, observers categorized morphed images of photographs and human doll faces as "photograph" or "doll" and evaluated the perceived eeriness of the images. Additionally, we asked the observers to answer questionnaires on behavioral inhibition systems (BIS). The results indicated that individual differences in the BIS score were associated with enhanced eeriness in the objects with a specific human likeness. These findings suggest that the tendency to avoid a potentially threatening novel experience contributes to promoting the perceived eeriness of objects with some degree of visual similarity to real humans.

Original languageEnglish
Article number1792
JournalFrontiers in Psychology
Issue numberOCT
Publication statusPublished - Oct 26 2017

All Science Journal Classification (ASJC) codes

  • Psychology(all)


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