Elsweiler, D., Trattner, C. and Harvey, M. (2017) Exploiting food choice biases for healthier recipe recommendation. In: Kando, N., Sakai, T., Joho, H., Li, H., de Vries, A.P. and White, R.W., (eds.) SIGIR '17: Proceedings of the 40th International ACM SIGIR Conference on Research and Development in Information Retrieval. SIGIR '17: The 40th International ACM SIGIR conference on research and development in Information Retrieval, 2017-08, Tokyo, Japan. Association for Computing Machinery (ACM) , pp. 575-584. ISBN 9781450350228
Abstract
By incorporating healthiness into the food recommendation / ranking process we have the potential to improve the eating habits of a growing number of people who use the Internet as a source of food inspiration. In this paper, using insights gained from various data sources, we explore the feasibility of substituting meals that would typically be recommended to users with similar, healthier dishes. First, by analysing a recipe collection sourced from Allrecipes.com, we quantify the potential for finding replacement recipes, which are comparable but have different nutritional characteristics and are nevertheless highly rated by users. Building on this, we present two controlled user studies (n=107, n=111) investigating how people perceive and select recipes. We show participants are unable to reliably identify which recipe contains most fat due to their answers being biased by lack of information, misleading cues and limited nutritional knowledge on their part. By applying machine learning techniques to predict the preferred recipes, good performance can be achieved using low-level image features and recipe meta-data as predictors. Despite not being able to consciously determine which of two recipes contains most fat, on average, participants select the recipe with the most fat as their preference. The importance of image features reveals that recipe choices are often visually driven. A final user study (n=138) investigates to what extent the predictive models can be used to select recipe replacements such that users can be "nudged'' towards choosing healthier recipes. Our findings have important implications for online food systems.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | © 2017 ACM. This is an author-produced version of a paper subsequently published in SIGIR '17 Proceedings. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Food RecSys; human decision making; behavioural change; information behaviour |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Social Sciences (Sheffield) > Information School (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 29 Sep 2020 10:05 |
Last Modified: | 29 Sep 2020 19:56 |
Status: | Published |
Publisher: | Association for Computing Machinery (ACM) |
Refereed: | Yes |
Identification Number: | 10.1145/3077136.3080826 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:165585 |