Patrick Ehrenbrink studied Cognitive Science at University of Osnabrück and Human Factors at Technische Universität Berlin. He completed his PhD at the Quality and Usability Lab at Technische Universität Berlin. He was also appointed as a Research Fellow at the University of Technology, Sydney. He has published in several major journals and conference proceedings.

• Introduction.- Part I.- Motivation.- Part II Relevance of Psychological Reactance in Human-Computer Interaction.- Psychological Reactance Relevant for Human-Computer Interaction.- Literature Search – Reactance in Literature.- Expert Survey-Triggers for State Reactance.- Smart Home Study-Trait Reactance.- Intermediate Discussion on the Relevance of Psychological Reactance for Human-Computer Interaction.- Part III Measurement of State Reactance.- Research Question: How can State Reactance be Measured.- Reactance Scale for Human-Computer Interaction.- Validation.- Intermediate Discussion on the Reactance Scale for Human-Computer Interaction.- Part IV Determinants of State Reactance.- Research Question: What Factors Influence State Reactance.- Persuasive Assistant Study-Moderator Variables.- Intermediate Discussion on Determinants of State Reactance.- Part V General Discussion.- Research Outcomes.- Outlook and Future Research.- Conclusion.