Persuasive Technology: Using Computers to Change What We Think and Do
Persuasive Technology: Using Computers to Change What We Think and Do
iCat: an animated user-interface robot with personality
Proceedings of the fourth international joint conference on Autonomous agents and multiagent systems
Computers in talk-based mental health interventions
Interacting with Computers
International Journal of Human-Computer Studies
Effects of Multimodal Feedback on the Usability of Mobile Diet Diary for Older Adults
UAHCI '09 Proceedings of the 5th International Conference on Universal Access in Human-Computer Interaction. Part III: Applications and Services
International Journal of Human-Computer Studies
Proceedings of the 28th Annual European Conference on Cognitive Ergonomics
Why won't you do what's good for you? using intelligent support for behavior change
HBU'11 Proceedings of the Second international conference on Human Behavior Unterstanding
Do underlying attitudes affect users' subjective experiences?: the case of an empathic agent
Proceedings of the 2013 international conference on Autonomous agents and multi-agent systems
A remote social robot to motivate and support diabetic children in keeping a diary
Proceedings of the 2014 ACM/IEEE international conference on Human-robot interaction
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In accordance with the global trend, in The Netherlands approximately 45% of the population is overweight. Existing studies show that patient self-management can reduce these figures, but medical non-adherence is a persistent problem. eHealth can potentially increase adherence to self-management. Consequently, we designed a persuasive computer assistant and evaluated its influence on self-management, i.e., the use of an online lifestyle diary called DieetInzicht.nl. The assistant is represented by an animated iCat, which shows different facial expressions and provides cooperative feedback following principles from the motivational interviewing method. We conducted a randomized controlled trial with 118 overweight people over a period of four weeks and studied the difference between diary use with and without computer assistant feedback. Results show that the computer assistant contributed to filling in the diary more frequently, reduced the decline in motivation to perform self-management, lowered the (reported) BMI, and improved the ease of use. Furthermore, diary use increased knowledge of maintaining a healthy lifestyle. Finally, personal characteristics, i.e., locus of control, vocabulary, computer experience, age, gender, education level and initial BMI, explained the variance in the diary use and its outcome. Of the 118 participants 35 filled in the closing survey, covering motivation, BMI, lifestyle knowledge and ease of use, which implies that the findings based on these results are mainly representative for motivated participants. In general, this study shows that the Dieetinzicht eHealth service, including a personal computer assistant, is likely to support motivated overweight people and lifestyle related diseases to get a better insight in and adhere to their self-management.