Economic, social and ecological sustainability presents one of the greatest challenges of our
society. As a result, there is growing pressure on a variety of organizations to implement …

Background: Depression is a common cause of reduced well-being and prognosis in
patients with cardiovascular disease (CVD). However, there is a lack of effective intervention …

Background: Internet-based cognitive behavioral therapy (iCBT) for children and
adolescents is a persuasive system that combines 3 major components to therapy …

Credibility of systems is important in Human-Computer Interaction (HCI) and when
designing persuasive systems. Still, the role of credibility in the design of persuasive …

In this paper, we present results from a randomized controlled trial (RCT) that examined the
impact of persuasive reminders and virtual rehearsal on the effectiveness of a behavior …

Behavior change is a highly relevant and studied topic in the psychology discipline. Through
integrating technologies into everyday life, behavior change support systems (BCSS) have …

Perceived persuasiveness, an individual's acknowledgement of the system's influence on
the self, may affect users' response to persuasion attempts. Existing research mainly focused …

This paper presents qualitative findings from two field studies that focused on supporting
people with sleeplessness (Study I) and moderate depression (Study II). Both the studies …

Note: All essays in this dissertation have been slightly modified compared to their published
version to facilitate readability. Modifications include a continuous page count, adjusted …

First, I would like to give my warmest thanks to Prof. Dr. Marco Meier who guided and
coached me as a supervisor for more than four years. He allowed and enabled me to grow …