J. Med. Internet Res. - Automated indexing of Internet stories for health behavior change: weight loss attitude pilot study.

Tópicos

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Resumo

CKGROUND: Automated health behavior change interventions show promise, but suffer from high attrition and disuse. The Internet abounds with thousands of personal narrative accounts of health behavior change that could not only provide useful information and motivation for others who are also trying to change, but an endless source of novel, entertaining stories that may keep participants more engaged than messages authored by interventionists.OBJECTIVE: Given a collection of relevant personal health behavior change stories gathered from the Internet, the aim of this study was to develop and evaluate an automated indexing algorithm that could select the best possible story to provide to a user to have the greatest possible impact on their attitudes toward changing a targeted health behavior, in this case weight loss.METHODS: An indexing algorithm was developed using features informed by theories from behavioral medicine together with text classification and machine learning techniques. The algorithm was trained using a crowdsourced dataset, then evaluated in a 2?2 between-subjects randomized pilot study. One factor compared the effects of participants reading 2 indexed stories vs 2 randomly selected stories, whereas the second factor compared the medium used to tell the stories: text or animated conversational agent. Outcome measures included changes in self-efficacy and decisional balance for weight loss before and after the stories were read.RESULTS: Participants were recruited from a crowdsourcing website (N=103; 53.4%, 55/103 female; mean age 35, SD 10.8 years; 65.0%, 67/103 precontemplation; 19.4%, 20/103 contemplation for weight loss). Participants who read indexed stories exhibited a significantly greater increase in self-efficacy for weight loss compared to the control group (F1,107=5.5, P=.02). There were no significant effects of indexing on change in decisional balance (F1,97=0.05, P=.83) and no significant effects of medium on change in self-efficacy (F1,107=0.04, P=.84) or decisional balance (F1,97=0.78, P=.38).CONCLUSIONS: Personal stories of health behavior change can be harvested from the Internet and used directly and automatically in interventions to affect participant attitudes, such as self-efficacy for changing behavior. Such approaches have the potential to provide highly tailored interventions that maximize engagement and retention with minimal intervention development effort.

Resumo Limpo

ckground autom health behavior chang intervent show promis suffer high attrit disus internet abound thousand person narrat account health behavior chang provid use inform motiv other also tri chang endless sourc novel entertain stori may keep particip engag messag author interventionistsobject given collect relev person health behavior chang stori gather internet aim studi develop evalu autom index algorithm select best possibl stori provid user greatest possibl impact attitud toward chang target health behavior case weight lossmethod index algorithm develop use featur inform theori behavior medicin togeth text classif machin learn techniqu algorithm train use crowdsourc dataset evalu betweensubject random pilot studi one factor compar effect particip read index stori vs random select stori wherea second factor compar medium use tell stori text anim convers agent outcom measur includ chang selfefficaci decision balanc weight loss stori readresult particip recruit crowdsourc websit n femal mean age sd year precontempl contempl weight loss particip read index stori exhibit signific greater increas selfefficaci weight loss compar control group f p signific effect index chang decision balanc f p signific effect medium chang selfefficaci f p decision balanc f pconclus person stori health behavior chang can harvest internet use direct automat intervent affect particip attitud selfefficaci chang behavior approach potenti provid high tailor intervent maxim engag retent minim intervent develop effort

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