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This paper explores the potential of emotion-adaptive eco-feedback in personal assistant, particularly within home environments, to foster well-being, energy efficiency, and personalised user experiences. Currently, there is limited research on how users perceive emotion-adaptive eco-feedback and how emotion AI can be adopted in the eco-feedback within personal assistant in real-world settings. To address this, we employed a co-design method \u2014 Matchmaking for AI \u2014 to facilitate collaboration between real users and researchers. We built a living lab with 11 participants in Germany for half a year and conducted two experimental sessions: a pre-interview to understand user behaviours, requirements, and expectations on eco-feedback, and a co-design session using matchmaking for AI after half a year based on their appliance energy consumption data collected by our smart plugs using our open. DASH platform. The co-design sessions collaboratively brainstorm ideas for potential emotion AI adoptions and identify what their needs should be addressed by emotion AI technology. Through a co-design session, we generated eight design ideas that integrate emotion AI into eco-feedback. These concepts include emotion-adaptive eco-feedback framing, emotion-timed interaction and delivery and emotion-aware environment and social adaption. Our work explores the potential of using Emotion AI in eco-feedback within personal assistant and also provides new insights into AI co-design methodologies.<\/jats:p>","DOI":"10.1145\/3789680","type":"journal-article","created":{"date-parts":[[2026,3,16]],"date-time":"2026-03-16T17:51:14Z","timestamp":1773683474000},"page":"1-24","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Reimagining Emotion AI at Home: Exploring the Potential of Emotion-adaptive Eco-feedback in Personal Assistant Using Matchmaking for AI"],"prefix":"10.1145","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6901-4580","authenticated-orcid":false,"given":"Lu","family":"Jin","sequence":"first","affiliation":[{"name":"University of Siegen, Siegen, Germany and Fraunhofer-Institute for Applied Information Technology FIT, Sankt Augustin, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6138-7865","authenticated-orcid":false,"given":"Apostolos","family":"Vavouris","sequence":"additional","affiliation":[{"name":"Electronic and Electrical Engineering, University of Strathclyde, Glasgow, United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5916-876X","authenticated-orcid":false,"given":"Nico","family":"Castelli","sequence":"additional","affiliation":[{"name":"Fraunhofer-Institute for Applied Information Technology FIT, Sankt Augustin, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9601-8122","authenticated-orcid":false,"given":"Dominik","family":"Pins","sequence":"additional","affiliation":[{"name":"Human-Centered Engineering &amp; Design, Fraunhofer-Institute for Applied Information Technology FIT, Sankt Augustin, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6470-1151","authenticated-orcid":false,"given":"Alexander","family":"Boden","sequence":"additional","affiliation":[{"name":"Institute for Consumer Informatics, Bonn-Rhein-Sieg University of Applied Science, Sankt Augustin, Germany and Human Centered Engineering &amp; Design, Fraunhofer-Institute for Applied Information Technology FIT, Sankt Augustin, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8112-1976","authenticated-orcid":false,"given":"Lina","family":"Stankovic","sequence":"additional","affiliation":[{"name":"Electronics and Electrical Engineering, University of Strathclyde, Glasgow, United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1075-2420","authenticated-orcid":false,"given":"Vladimir","family":"Stankovic","sequence":"additional","affiliation":[{"name":"Electronics and Electrical Engineering, University of Strathclyde, Glasgow, United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2026,3,16]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1109\/ACCESS.2022.3161845"},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/3218585.3218595"},{"key":"e_1_2_1_3_1","doi-asserted-by":"crossref","unstructured":"Anders-Petter Andersson Cecilie Eide Eleftherios Papachristou Anne-Britt Torkildsby Yavuz Inal et al. 2024. 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