Contents Chapter 1 General introduction Chapter 2 The WOOL Dialogue Platform: Enabling interdisciplinary user-friendly development of dialogue for conversational agents Chapter 3 Tailoring coaching strategies to users' motivation in a multiagent health coaching application Chapter 4 What to discuss? -A blueprint topic model for health coaching dialogues with conversational agents Chapter 5 Automatic topic selection for embodied conversational agents in health coaching: A micro-randomized trial Chapter 6 General discussion & Appendices References Summary Samenvatting Dankwoord About the author Progress range