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We apply the mechanisms-and-conditions framework of affordance theory to examine adolescents\u2019 imagined affordances of self-tracking apps and devices. Based on qualitative data from an online survey of 16- to 18-year-olds in the United Kingdom, we find the following three key themes in how adolescents imagine the affordances of digital self-tracking: (1) the variability of use across adolescents and with adults, (2) the role of the social control of data in school settings, and (3) the salience of social comparisons among their peers. Using these findings, we show how social and institutional configurations come to matter for technological affordances. By examining adolescents\u2019 imagined affordances for self-tracking, we suggest self-tracking research move away from a \u201cone size fits all approach\u201d and begin to highlight the differences in practices from adults and across adolescents.<\/jats:p>","DOI":"10.1177\/14614448211040266","type":"journal-article","created":{"date-parts":[[2021,8,27]],"date-time":"2021-08-27T08:15:55Z","timestamp":1630052155000},"page":"3047-3064","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":19,"title":["The challenge of repurposed technologies for youth: Understanding the unique affordances of digital self-tracking for adolescents"],"prefix":"10.1177","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2984-5774","authenticated-orcid":false,"given":"Jaimie Lee","family":"Freeman","sequence":"first","affiliation":[{"name":"University of Oxford, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9090-924X","authenticated-orcid":false,"given":"Gina","family":"Neff","sequence":"additional","affiliation":[{"name":"University of Cambridge, UK; University of Oxford, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2021,8,27]]},"reference":[{"key":"bibr1-14614448211040266","unstructured":"Apple. 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