General Introduction & Outline 17 1 Chapter 3 “The Application of Validating and Dialectical Coaching Strategies in a Personalised Virtual Coach for Obese Emotional Eaters. Rationale for a Personalised Coaching System” describes a design rationale for a virtual coach presenting the components and functionalities that provide a system for self management for emotional eaters, using the results of the design case study in Chapter 2, and the personas developed from there. In this chapter, we introduce a research protocol that focuses on the implementation of coaching strategies and skill exercises derived from Dialectical Behavior Therapy for participants. The coaching strategies are presented through the personas, which were developed and discussed in the preceding chapter. In the Chapters 4 and 5, the vignettes methodology is employed (using two different study populations), wherein the personas created in Chapters 2 and 3 are utilized to represent the two significant scenarios commonly encountered by individuals with emotional eating: 1. experiencing cravings, and 2. after giving into cravings. These personas are presented to participants online, followed by the provision of potentially suitable coaching strategies. Chapter 4 “Application of three different coaching strategies through a virtual coach for people with emotional eating: a vignette study” describes the conduct of the qualitative study. In this chapter we will attempt to answer the question of whether adult participants with emotional eating behaviour identify themselves with the situations as presented using personas, and which coaching strategy matches the needs of adults with emotional eating. Chapter 5 “Preferences for coaching strategies in a personalized virtual coach for emotional eaters: an explorative study” reports about the conduct of the quantitative study. In this chapter we will attempt to explore if there are predictors for identification with the typical problem situations for emotional eaters ‘experiencing cravings’ and ‘after giving in to cravings’ and what are the preferences for a specific coaching strategy with regards to the two typical problem situations for emotional eating. Questionnaires on emotional eating (DEBQ), personality traits (Big-5), well-being (PANAS), and BMI will be administrated to gain further insights into the potential of tailored coaching. Chapter 6 (“Exploring Tailored Virtual Emotion Regulation Approaches for Individuals with Emotional Eating”) covers an embedded mixed-method design study on exploring a tailored online approachwith the aim to positively influence affect (positive and negative) and emotion regulation by studying three exercises based on dialectical behavioural therapy. We will explore effects and perceived usefulness of tailored exercises in emotion regulation.
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