43 research outputs found
Inducing sadness and anxiousness through visual media: measurement techniques and persistence
The persistence of negative moods (sadness and anxiousness) induced by three visual Mood Induction
Theory-based Habit Modeling for Enhancing Behavior Prediction
Psychological theories of habit posit that when a strong habit is formed
through behavioral repetition, it can trigger behavior automatically in the
same environment. Given the reciprocal relationship between habit and behavior,
changing lifestyle behaviors (e.g., toothbrushing) is largely a task of
breaking old habits and creating new and healthy ones. Thus, representing
users' habit strengths can be very useful for behavior change support systems
(BCSS), for example, to predict behavior or to decide when an intervention
reaches its intended effect. However, habit strength is not directly observable
and existing self-report measures are taxing for users. In this paper, built on
recent computational models of habit formation, we propose a method to enable
intelligent systems to compute habit strength based on observable behavior. The
hypothesized advantage of using computed habit strength for behavior prediction
was tested using data from two intervention studies, where we trained
participants to brush their teeth twice a day for three weeks and monitored
their behaviors using accelerometers. Through hierarchical cross-validation, we
found that for the task of predicting future brushing behavior, computed habit
strength clearly outperformed self-reported habit strength (in both studies)
and was also superior to models based on past behavior frequency (in the larger
second study). Our findings provide initial support for our theory-based
approach of modeling user habits and encourages the use of habit computation to
deliver personalized and adaptive interventions
Expected Information Needs of Parents for Pervasive Awareness Systems
Abstract. This paper examines the communication needs of busy parents that can be served by awareness systems: systems supporting a continuous and semi-automated flow of information about the activities of communicating individuals. We report an online survey involving 69 participants. This survey focused on whether the types of information offered by awareness systems as these are introduced in current research literature are appreciated by busy parents. The results show a) that information items that allow personalization and expressing intentionality are more desired than those than low granularity and automatically sensed information that is easy to collect automatically b) the attitudes regarding the information that people wish to share about themselves is almost identical to what they wish to know of their partners and c) survey methods focusing on information do not need to differentiate between the direction of information flow or whether this is symmetric, since people report almost identical preferences
Testing interactive products with the robot intervention method
This paper introduces robot intervention, a novel approach to usability testing with children. A social robot is used as a proxy for a test administrator who conducts an active intervention session remotely in a Wizard of Oz fashion. The motivation of the technique is that children will feel at ease and enjoy interacting with the social robot, and thus produce more frequent and informative verbalizations regarding their interaction with the product under test. First experiences regarding this method are positive with regards to the feasibility of the method and with regards to how well it is received by children
P.: Can you be persuaded? individual differences in susceptibility to persuasion. INTERACT
Abstract. Persuasive technologies are growing in popularity and many designers create systems which intentionally change users attitudes or behaviors. This study shows that peoples individual differences in susceptibility to persuasion, as implemented using the six persuasion principles proposed by Cialdini [2], relates to their compliance to a persuasive request which is accompanied by a persuasive cue. This result is a starting point for designers to start incorporating individual differences in susceptibility to persuasive cues in their adaptive persuasive systems