Automated personalized goal-setting in an activity coaching application

The ageing population and the increase in sedentary lifestyles of knowledge workers has led to increasing concerns about the physical activity habits of the European population. Pervasive technologies and theories of behavioral change are being combined in an effort to promote physical activity. The Activity Coach is an example of one such system. Whereas the previous version of the Activity Coach set a fixed and permanent daily goal, in this work we describe the addition of an automatically adaptive goal-setting feature to this existing system. With the new feature, the daily goals for physical activity are set based on the user's routine, contributing to the personalization of the system. A technical evaluation was performed to test the system's adaptation to the user's routine. Additionally, a conversion factor between a unit of energy expenditure and number of steps was determined. The evaluation indicates that our method of goal-setting provides more challenging but still attainable goals when compared to the previous version. Additional evaluations are recommended to evaluate the user's perception and effects on physical activity behavior change of this new feature. The results of this research are implemented in the existing Activity Coach and will be used in future patient evaluations

Targeting the automatic: Nonconscious behaviour change using technology

Digital interventions have great potential to support people to change their behaviour. However, most interventions focus on strategies that target limited conscious resources, reducing their potential impact. We outline how these may fail in the longer-term due to issues with theory, users and technology. We propose an alternative: the direct targeting of nonconscious processes to achieve behaviour change. We synthesise Dual Process Theory, modern habit theory and Goal Setting Theory, which together model how users form and break nonconscious behaviours, into an explanatory framework to explore nonconscious behaviour change interventions. We explore the theoretical and practical implications of this approach, and apply it to a series of empirical studies. The studies explore nonconscious-targeting interventions across a continuum of conscious attention required at the point of behavioural action, from high (just-in-time reminders within Implementation Intentions) to medium (training paradigms within cognitive bias modification) to low (subliminal priming). The findings show that these single-nonconscious-target interventions have mixed results in in-the-wild and semi-controlled conditions. We conclude by outlining how interventions might strategically deploy multiple interventions that target the nonconscious at differing levels of conscious attention, and by identifying promising avenues of future research