Online engagement for a healthier you: a case study of web-based supermarket health program

Ling Luo, Bin Li, Shlomo Berkovsky, Irena Koprinska, Fang Chen

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

2 Citations (Scopus)


Obesity is a growing problem affecting millions of people. Various behavior change programs have been designed to reduce its prevalence. An Australian supermarket has recently run a web-based health program to motivate people to eat healthily and do more physical activity. The program offered discounts on fresh products and a website, HealthierU, providing interactive support tools for participants. The stakeholders desire to evaluate if the program is effective and if the supporting website is useful to facilitate behavior changes. To answer these questions, in this work we propose a method to: (1) model individual purchase rate from sparse recorded transactions through a mixture of Non-Homogeneous Poisson Processes (NHPP), (2) design criteria for partitioning participants based on their interactions with the HealthierU website, (3) evaluate the program impact by comparing behavior changes across different groups of participants. Our case study shows that during the program the participants significantly increased their purchases of some fresh products. Both the distribution of behavior patterns and impact scores show that the program imposed relatively strong impact on the participants who logged activities and tracked weights. Our method can facilitate the enhancement of personalized health programs, especially aiming to maximize the program impact and targeting participants through web or mobile applications.
Original languageEnglish
Title of host publicationProceedings of the 26th International Conference on World Wide Web Companion
Place of PublicationGeneva
PublisherAssociation for Computing Machinery (ACM)
Number of pages9
ISBN (Electronic)9781450349147
Publication statusPublished - 2017
Externally publishedYes
Event26th International World Wide Web Conference, WWW 2017 Companion - Perth, Australia
Duration: 3 Apr 20177 Apr 2017


Conference26th International World Wide Web Conference, WWW 2017 Companion


  • supermarket health program
  • activity logs
  • online support
  • purchase behavior model
  • non-homogeneous Poisson process


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