{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:30:41Z","timestamp":1760236241436,"version":"build-2065373602"},"reference-count":51,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2021,11,4]],"date-time":"2021-11-04T00:00:00Z","timestamp":1635984000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>Is Mr. Hyde more similar to his alter ego Dr. Jekyll, because of their physical identity, or to Jack the Ripper, because both evoke fear and loathing? The relative weight of emotional and visual dimensions in similarity judgements is still unclear. We expected an asymmetric effect of these dimensions on similarity perception, such that faces that express the same or similar feeling are judged as more similar than different emotional expressions of same person. We selected 10 male faces with different expressions. Each face posed one neutral expression and one emotional expression (five disgust, five fear). We paired these expressions, resulting in 190 pairs, varying either in emotional expressions, physical identity, or both. Twenty healthy participants rated the similarity of paired faces on a 7-point scale. We report a symmetric effect of emotional expression and identity on similarity judgements, suggesting that people may perceive Mr. Hyde to be just as similar to Dr. Jekyll (identity) as to Jack the Ripper (emotion). We also observed that emotional mismatch decreased perceived similarity, suggesting that emotions play a prominent role in similarity judgements. From an evolutionary perspective, poor discrimination between emotional stimuli might endanger the individual.<\/jats:p>","DOI":"10.3390\/sym13112091","type":"journal-article","created":{"date-parts":[[2021,11,4]],"date-time":"2021-11-04T22:25:54Z","timestamp":1636064754000},"page":"2091","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Symmetry in Emotional and Visual Similarity between Neutral and Negative Faces"],"prefix":"10.3390","volume":"13","author":[{"given":"Martina","family":"Riberto","sequence":"first","affiliation":[{"name":"Division of Neuroscience and Experimental Psychology, University of Manchester, Oxford Rd., Manchester M13 9PL, UK"},{"name":"Department of Neurobiology, Weizmann Institute of Science, Herzl St. 234, Rehovot 7610001, Israel"}]},{"given":"Deborah","family":"Talmi","sequence":"additional","affiliation":[{"name":"Department of Psychology, University of Cambridge, Cambridge CB2 3ED, UK"}]},{"given":"Gorana","family":"Pobric","sequence":"additional","affiliation":[{"name":"Division of Neuroscience and Experimental Psychology, University of Manchester, Oxford Rd., Manchester M13 9PL, UK"}]}],"member":"1968","published-online":{"date-parts":[[2021,11,4]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1037\/0022-3514.38.2.311","article-title":"A description of the affective quality attributed to environments","volume":"38","author":"Russell","year":"1980","journal-title":"J. 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