Exploring the importance of shape on dynamic recognition of self-face or friend-face

Exploring the importance of shape on dynamic recognition of self-face or friend-face | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Exploring the importance of shape on dynamic recognition of self-face or friend-face Sogo Yumura, Karen Lander, Miyuki G. Kamachi This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6755511/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 28 Mar, 2026 Read the published version in Scientific Reports → Version 1 posted 13 You are reading this latest preprint version Abstract Our own face is well-known to us but it is unclear whether we perceive it in the same way as other familiar faces. Unlike others’ faces, self-faces provide limited opportunities to observe facial motion. This study investigated the importance of shape when recognizing self or friend from dynamic face clips. Dynamic sequences were created using Deepfake, manipulating face shape and motion independently. In both experiments, participants observed a visually presented face and identified whether the face motion was self or friend. In Experiment 1, face shape was manipulated to match or mismatch the dynamic parameters of the observed person. In Experiment 2, the contribution of self- and friend shape was manipulated in a series of stages to match or mismatch the dynamic parameters. The results showed the identification of the friend’s face motion was independent of the observed face shape. However, self-face motion could not be clearly identified until the face shape was judged to be self-face. These results support the prediction that self-face motion identification is more dependent on face shape, compared another familiar face. We propose that self-faces may have specific perceptual characteristics that are distinct from the recognition of other familiar faces. Biological sciences/Psychology Biological sciences/Psychology/Human behaviour Physical sciences/Mathematics and computing/Information technology Face Recognition Self-Face Dynamic Facial Information Identification Deepfake Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 28 Mar, 2026 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 23 Jul, 2025 Reviews received at journal 22 Jul, 2025 Reviews received at journal 08 Jul, 2025 Reviews received at journal 07 Jul, 2025 Reviewers agreed at journal 23 Jun, 2025 Reviewers agreed at journal 19 Jun, 2025 Reviewers agreed at journal 17 Jun, 2025 Reviewers agreed at journal 16 Jun, 2025 Reviewers invited by journal 15 Jun, 2025 Editor assigned by journal 11 Jun, 2025 Editor invited by journal 11 Jun, 2025 Submission checks completed at journal 08 Jun, 2025 First submitted to journal 08 Jun, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6755511","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":472127319,"identity":"cb3c6d0e-2e14-4a3d-9205-8f61b2d76e99","order_by":0,"name":"Sogo Yumura","email":"data:image/png;base64,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","orcid":"","institution":"Infomatics Program, Graduate School of Engineering, Kogakuin University","correspondingAuthor":true,"prefix":"","firstName":"Sogo","middleName":"","lastName":"Yumura","suffix":""},{"id":472127326,"identity":"27c12837-f390-4710-a3d1-8d5421a02a8e","order_by":1,"name":"Karen Lander","email":"","orcid":"","institution":"Division of Psychology, Communication and Human Neuroscience, University of Manchester","correspondingAuthor":false,"prefix":"","firstName":"Karen","middleName":"","lastName":"Lander","suffix":""},{"id":472127332,"identity":"85ac63d3-73a8-49d1-9c44-926c73094ec0","order_by":2,"name":"Miyuki G. 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Unlike others\u0026rsquo; faces, self-faces provide limited opportunities to observe facial motion. This study investigated the importance of shape when recognizing self or friend from dynamic face clips. Dynamic sequences were created using Deepfake, manipulating face shape and motion independently. In both experiments, participants observed a visually presented face and identified whether the face motion was self or friend. In Experiment 1, face shape was manipulated to match or mismatch the dynamic parameters of the observed person. In Experiment 2, the contribution of self- and friend shape was manipulated in a series of stages to match or mismatch the dynamic parameters. The results showed the identification of the friend\u0026rsquo;s face motion was independent of the observed face shape. However, self-face motion could not be clearly identified until the face shape was judged to be self-face. These results support the prediction that self-face motion identification is more dependent on face shape, compared another familiar face. 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