Evangelos Karapanos – författare

This book constitutes the refereed proceedings of the 14th International Conference on Persuasive Technology, PERSUASIVE 2019, held in Limassol, Cyprus, in April 2019.

The 29 full papers presented were carefully reviewed and selected from 79 submissions. The papers demonstrate how persuasive technologies can help solve societal issues. They were subsequently grouped in the following topical sections: Terminologies and methodologies; self-monitoring and reflection; systems development process; drones and automotives; ethical and legal aspects; special application domains; motivation and goal setting; personality, age and gender; social support; user types and tailoring.

Longitudinal studies have traditionally been seen as too cumbersome and labor-intensive to be of much use in research on Human-Computer Interaction (HCI). However, recent trends in market, legislation, and the research questions we address, have highlighted the importance of studying prolonged use, while technology itself has made longitudinal research more accessible to researchers across different application domains. 

Aimed as an educational resource for graduate students and researchers in HCI, this book brings together a collection of chapters, addressing theoretical and methodological considerations, and presenting case studies of longitudinal HCI research. Among others, the authors:

This book constitutes the refereed proceedings of the 20th International Conference on Persuasive Technology, PERSUASIVE 2025, held in Limassol, Cyprus, during May 5–7, 2025.

The 17 full papers and 6 short papers included in this book were carefully reviewed and selected from 49 submissions. They are organized in topical sections as follows: Personalized Persuasion; Theory and Exploration; Design and Solutions; Emotions and Behaviour; Behavior Change Games; Personality and Individual Differences.

Over the past decade the field of Human-Computer Interaction has evolved from the study of the usability of interactive products towards a more holistic understanding of how they may mediate desired human experiences. 

This book identifies the notion of diversity in usersʼ experiences with interactive products and proposes methods and tools for modeling this along two levels: (a) interpersonal diversity in usersʽ responses to early conceptual designs, and (b) the dynamics of usersʼ experiences over time.

The Repertory Grid Technique is proposed as an alternative to standardized psychometric scales for modeling interpersonal diversity in usersʼ responses to early concepts in the design process, and new Multi-Dimensional Scaling procedures are introduced for modeling such complex quantitative data.

iScale, a tool for the retrospective assessment of usersʼ experiences over time is proposed as an alternative to longitudinal field studies, and a semi-automated technique for the analysis of the elicited experience narratives is introduced.

Through these two methodological contributions, this book argues against averaging in the subjective evaluation of interactive products. It proposes the development of interactive tools that can assist designers in moving across multiple levels of abstraction of empirical data, as design-relevant knowledge might be found on all these levels.

Foreword by Jean-Bernard Martens and Closing Note by Marc Hassenzahl.