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Interact."],"published-print":{"date-parts":[[2024,10,24]]},"abstract":"<jats:p>\n            Virtual mirrors displaying weight changes can support users in forming healthier habits by visualizing potential future body shapes. However, these often come with privacy, feasibility, and cost limitations. This paper introduces the Magic Mirror, a novel distortion-based mirror that leverages curvature effects to alter the appearance of body size while preserving privacy. We constructed the Magic Mirror and compared it to a video-based alternative. In an online study (\n            <jats:italic>N<\/jats:italic>\n            =115), we determined the optimal parameters for each system, comparing weight change visualizations and manipulation levels. Afterward, we conducted a laboratory study (\n            <jats:italic>N<\/jats:italic>\n            =24) to compare the two systems in terms of user perception, motivational potential, and willingness to use daily. Our findings indicate that the Magic Mirror surpasses the video-based mirror in terms of suitability for residential application, as it addresses feasibility concerns commonly associated with virtual mirrors. Our work demonstrates that mirrors that display weight changes can be implemented in users\u2019 homes without any cameras, ensuring privacy.\n          <\/jats:p>","DOI":"10.1145\/3698149","type":"journal-article","created":{"date-parts":[[2024,10,24]],"date-time":"2024-10-24T19:23:51Z","timestamp":1729797831000},"page":"569-596","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Magic Mirror: Designing a Weight Change Visualization for Domestic Use"],"prefix":"10.1145","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0978-517X","authenticated-orcid":false,"given":"Jonas","family":"Keppel","sequence":"first","affiliation":[{"name":"University of Duisburg-Essen, Essen, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-1040-9175","authenticated-orcid":false,"given":"Marvin","family":"Strauss","sequence":"additional","affiliation":[{"name":"University of Duisburg-Essen, Essen, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5671-1640","authenticated-orcid":false,"given":"Uwe","family":"Gruenefeld","sequence":"additional","affiliation":[{"name":"University of Duisburg-Essen, Essen, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0132-4934","authenticated-orcid":false,"given":"Stefan","family":"Schneegass","sequence":"additional","affiliation":[{"name":"University of Duisburg-Essen, Essen, Germany"}]}],"member":"320","published-online":{"date-parts":[[2024,10,24]]},"reference":[{"doi-asserted-by":"publisher","key":"e_1_2_1_1_1","DOI":"10.1145\/3139131.3139154"},{"doi-asserted-by":"publisher","key":"e_1_2_1_2_1","DOI":"10.1145\/3555089"},{"doi-asserted-by":"publisher","key":"e_1_2_1_3_1","DOI":"10.1145\/3432209"},{"doi-asserted-by":"publisher","key":"e_1_2_1_4_1","DOI":"10.1145\/1520340.1520430"},{"doi-asserted-by":"publisher","key":"e_1_2_1_5_1","DOI":"10.1007\/978-3-319-19312-0_13"},{"doi-asserted-by":"publisher","key":"e_1_2_1_6_1","DOI":"10.1145\/3517233"},{"doi-asserted-by":"publisher","key":"e_1_2_1_7_1","DOI":"10.1016\/S1470-2045(02)00849-5"},{"volume-title":"Forschungsmethoden und Evaluation f\u00fcr Human-und Sozialwissenschaftler: Limitierte Sonderausgabe","author":"Bortz J\u00fcrgen","unstructured":"J\u00fcrgen Bortz and Nicola D\u00f6ring. 2007. 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