{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,6]],"date-time":"2026-03-06T01:44:21Z","timestamp":1772761461079,"version":"3.50.1"},"reference-count":43,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2022,2,23]],"date-time":"2022-02-23T00:00:00Z","timestamp":1645574400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100010269","name":"Wellcome Trust","doi-asserted-by":"publisher","award":["108903\/B\/15\/Z"],"award-info":[{"award-number":["108903\/B\/15\/Z"]}],"id":[{"id":"10.13039\/100010269","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Public Health"],"abstract":"<jats:p>The Change4Life Food Scanner app is a UK Government dietary app designed to provide feedback on the nutritional content of packaged foods to parents and their children. To understand its intended mechanism of behavior change and how Behavior Change Technique (BCT) content evolves with app updates, this research aimed to map out the BCTs of two versions of the Change4Life Food Scanner app. Two coders undertook a descriptive comparative analysis of the use of BCTs in the Food Scanner app using the Behavior Change Technique Taxonomy [both the outdated (v1.6) and updated (v2.0) versions of the app were coded]. Results showed that both versions encompass the BCTs \u201cgoal setting (behavior)\u201d, \u201cfeedback on behavior\u201d, \u201csocial support (unspecified)\u201d, \u201cinstruction on how to perform behavior\u201d, \u201csalience of consequences\u201d, \u201cprompts\/cues\u201d and \u201ccredible source\u201d. The outdated version contained the BCT \u201cbehavior substitution\u201d which had been dropped in the updated version. The updated version featured the additional BCTs \u201cinformation about social and environmental consequences\u201d, \u201cinformation about emotional consequences\u201d, \u201csocial reward\u201d and \u201csocial incentive\u201d and was comparatively more BCT intensive in terms of content and occurrence. The BCT content of the Food Scanner app resembles that of existing dietary apps and incorporates several BCTs which have previously been found to be effective. Future work to evaluate the effectiveness of the app is recommended. This will provide insight into whether the combination of BCTs used in the Change4Life Food Scanner app are effective in improving dietary choices.<\/jats:p>","DOI":"10.3389\/fpubh.2022.803152","type":"journal-article","created":{"date-parts":[[2022,2,23]],"date-time":"2022-02-23T11:58:34Z","timestamp":1645617514000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":9,"title":["An Assessment of Behavior Change Techniques in Two Versions of a Dietary Mobile Application: The Change4Life Food Scanner"],"prefix":"10.3389","volume":"10","author":[{"given":"Sundus","family":"Mahdi","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emily K.","family":"Michalik-Denny","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nicola J.","family":"Buckland","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2022,2,23]]},"reference":[{"key":"B1","unstructured":"National Child Measurement Programme data source 2012\/132013"},{"key":"B2","unstructured":"ButlandB\n            JebbS\n            KopelmanP\n            McPhersonK\n            ThomasS\n            MardellJ\n          Foresight. 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