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Designing for psychological change: individuals' reward and cost valuations in weight management.
(2014-06-26)
BACKGROUND: Knowledge of the psychological constructs that underlie behavior offers valuable design opportunities for persuasive systems. We use the decision theory, which describes how behavior is underpinned by reward-cost ...
Monetary cost for time spent in everyday physical activities.
(2014-05)
We measured utility curves for the hypothetical monetary costs as a function of time engaged in three everyday physical activities: walking, standing, and sitting. We found that activities requiring more physical exertion ...