Wissenspsychologie: Forschungsfragen, Anwendungsperspektiven, Bezüge zur Künstlichen Intelligenz. - Klaus Opwis; Hans Spada (GWAI, 1986)

The Constructive Process of Knowledge Acquisition: Student Modeling (Invited Paper). - Hans Spada; Michael Stumpf; Klaus Opwis (ICCAL, 1989)

Domain representation and student modelling in a microworld for elastic impacts. - Klaus Opwis; Michael Stumpf; Hans Spada (Informatics and Psychology Workshop, 1989)

Mentale Modelle dynamischer Systeme: Analyse und Weiterführung methodischer Grundlagen von psychologischen Experimenten zum Umgang von Personen mit Systemen. - Klaus Opwis (1989)

Problemlösen in der Physik: das kognitive Simulationsmodell Sepia. - Rolf Plötzner; Klaus Opwis (Künstliche Intell., 1995)

Mitteilungen der Gesellschaft fuer Kognitionswissenschaft e.V. - Klaus Opwis (Kognitionswissenschaft, 2000)

Tracking the subprocesses of decision-based action in the human frontal lobes. - Benjamin Rahm; Klaus Opwis; Christoph P. Kaller; Joachim Spreer; Ralf Schwarzwald; Erich Seifritz; Ulrike Halsband; Josef M. Unterrainer (NeuroImage, 2006)

Are Engineers Condemned to Design? A Survey on Software Engineering and UI Design in Switzerland. - Ljiljana Vukelja; Lothar Müller; Klaus Opwis (INTERACT (2), 2007)

Usable error message presentation in the World Wide Web: Do not show errors right away. - Javier A. Bargas-Avila; Glenn Oberholzer; Peter Schmutz; Marco de Vito; Klaus Opwis (Interact. Comput., 2007)

Beyond web content accessibility guidelines: Design of enhanced text user interfaces for blind internet users. - Stefan Leuthold; Javier A. Bargas-Avila; Klaus Opwis (Int. J. Hum. Comput. Stud., 2008)

Cognitive Load in eCommerce Applications - Measurement and Effects on User Satisfaction. - Peter Schmutz; Silvia Heinz; Yolanda Métrailler; Klaus Opwis (Adv. Hum. Comput. Interact., 2009)

Intranet satisfaction questionnaire: Development and validationof a questionnaire to measure user satisfaction with the Intranet. - Javier A. Bargas-Avila; Jonas Lötscher; Sébastien Orsini; Klaus Opwis (Comput. Hum. Behav., 2009)

Visual complexity of websites: Effects on users' experience, physiology, performance, and memory. - Alexandre N. Tuch; Javier A. Bargas-Avila; Klaus Opwis; Frank H. Wilhelm (Int. J. Hum. Comput. Stud., 2009)

Error prevention in online forms: Use color instead of asterisks to mark required-fields. - Stefan L. Pauwels; Christian Hübscher; Stefan Leuthold; Javier A. Bargas-Avila; Klaus Opwis (Interact. Comput., 2009)

ZeGo: Development and Validation of a Short Questionnaire to Measure User Satisfaction with e-Government Portals. - Javier A. Bargas-Avila; Sébastien Orsini; Marco de Vito; Klaus Opwis (Adv. Hum. Comput. Interact., 2010)

A Case Study of User-Centred Design in Four Swiss RUP Projects. - Ljiljana Vukelja; Klaus Opwis; Lothar Müller (Adv. Hum. Comput. Interact., 2010)

Building an interaction design pattern language: A case study. - Stefan L. Pauwels; Christian Hübscher; Javier A. Bargas-Avila; Klaus Opwis (Comput. Hum. Behav., 2010)

Symmetry and aesthetics in website design: It's a man's business. - Alexandre N. Tuch; Javier A. Bargas-Avila; Klaus Opwis (Comput. Hum. Behav., 2010)

Designing product listing pages - Effects on sales and users' cognitive workload. - Peter Schmutz; Sandra P. Roth; Mirjam Seckler; Klaus Opwis (Int. J. Hum. Comput. Stud., 2010)

Mental models for web objects: Where do users expect to find the most frequent objects in online shops, news portals, and company web pages? - Sandra P. Roth; Peter Schmutz; Stefan L. Pauwels; Javier A. Bargas-Avila; Klaus Opwis (Interact. Comput., 2010)

Working towards Usable Forms on the Worldwide Web: Optimizing Multiple Selection Interface Elements. - Javier A. Bargas-Avila; Olivia Brenzikofer; Alexandre N. Tuch; Sandra P. Roth; Klaus Opwis (Adv. Hum. Comput. Interact., 2011)

Working towards Usable Forms on the World Wide Web: Optimizing Date Entry Input Fields. - Javier A. Bargas-Avila; Olivia Brenzikofer; Alexandre N. Tuch; Sandra P. Roth; Klaus Opwis (Adv. Hum. Comput. Interact., 2011)

Vertical versus dynamic menus on the world wide web: Eye tracking study measuring the influence of menu design and task complexity on user performance and subjective preference. - Stefan Leuthold; Peter Schmutz; Javier A. Bargas-Avila; Alexandre N. Tuch; Klaus Opwis (Comput. Hum. Behav., 2011)

Enhancing online forms: Use format specifications for fields with format restrictions to help respondents. - Javier A. Bargas-Avila; Sébastien Orsini; Hannah Piosczyk; Dominic Urwyler; Klaus Opwis (Interact. Comput., 2011)

The organization of interaction design pattern languages alongside the design process. - Christian Hübscher; Stefan L. Pauwels; Sandra P. Roth; Javier A. Bargas-Avila; Klaus Opwis (Interact. Comput., 2011)

The Role of Visual Complexity in Affective Reactions to Webpages: Subjective, Eye Movement, and Cardiovascular Responses. - Alexandre N. Tuch; Sylvia D. Kreibig; Sandra P. Roth; Javier A. Bargas-Avila; Klaus Opwis; Frank H. Wilhelm (IEEE Trans. Affect. Comput., 2011)

Is beautiful really usable? Toward understanding the relation between usability, aesthetics, and affect in HCI. - Alexandre N. Tuch; Sandra P. Roth; Kasper Hornbæk; Klaus Opwis; Javier A. Bargas-Avila (Comput. Hum. Behav., 2012)

The role of visual complexity and prototypicality regarding first impression of websites: Working towards understanding aesthetic judgments. - Alexandre N. Tuch; Eva E. Presslaber; Markus Karl Stöcklin; Klaus Opwis; Javier A. Bargas-Avila (Int. J. Hum. Comput. Stud., 2012)

User-friendly locations of error messages in web forms: Put them on the right side of the erroneous input field. - Mirjam Seckler; Alexandre N. Tuch; Klaus Opwis; Javier A. Bargas-Avila (Interact. Comput., 2012)

Online ad banners: the effects of goal orientation and content congruence on memory. - Silvia Heinz; Markus Hug; Carina Nugaeva; Klaus Opwis (CHI Extended Abstracts, 2013)

Ads suit up!: effects of website and advertiser credibility on consumer responses to banner ads. - Markus Hug; Nina T. Suter; Elisa D. Mekler; Klaus Opwis (CHI Extended Abstracts, 2013)

Disassembling gamification: the effects of points and meaning on user motivation and performance. - Elisa D. Mekler; Florian Brühlmann; Klaus Opwis; Alexandre N. Tuch (CHI Extended Abstracts, 2013)

Empirical evaluation of 20 web form optimization guidelines. - Mirjam Seckler; Silvia Heinz; Javier A. Bargas-Avila; Klaus Opwis; Alexandre N. Tuch (CHI Extended Abstracts, 2013)

Do points, levels and leaderboards harm intrinsic motivation?: an empirical analysis of common gamification elements. - Elisa D. Mekler; Florian Brühlmann; Klaus Opwis; Alexandre N. Tuch (Gamification, 2013)

Location matters, especially for non-salient features-An eye-tracking study on the effects of web object placement on different types of websites. - Sandra P. Roth; Alexandre N. Tuch; Elisa D. Mekler; Javier A. Bargas-Avila; Klaus Opwis (Int. J. Hum. Comput. Stud., 2013)

Response to the Reviews on Bargas-Avila et al. (2009) 'Intranet Satisfaction Questionnaire: Development and Validation of a Questionnaire to Measure User Satisfaction with the Intranet'. - Sébastien Orsini; Klaus Opwis; Javier A. Bargas-Avila (Interact. Comput., 2013)

The impact of interactive visual simulations on learning statistics. - Glena Helen Iten; Silvia Heinz; Markus Karl Stöcklin; Roland Hübscher; Klaus Opwis (CHI Extended Abstracts, 2014)

Mental models for web objects in different cultural settings. - Sebastian Linxen; Silvia Heinz; Livia J. Müller; Alexandre N. Tuch; Klaus Opwis (CHI Extended Abstracts, 2014)

A systematic review of quantitative studies on the enjoyment of digital entertainment games. - Elisa D. Mekler; Julia Ayumi Bopp; Alexandre N. Tuch; Klaus Opwis (CHI, 2014)

Designing usable web forms: empirical evaluation of web form improvement guidelines. - Mirjam Seckler; Silvia Heinz; Javier A. Bargas-Avila; Klaus Opwis; Alexandre N. Tuch (CHI, 2014)

A diary study exploring game completion and player experience. - Elisa D. Mekler; Alexandre N. Tuch; Anja Lea Martig; Klaus Opwis (CHI PLAY, 2014)

Long-term modality effect in multimedia learning. - Alessia P. Ruf; Mirjam Seckler; Klaus Opwis (NordiCHI, 2014)

"It Was Sad But Still Good": Gratifications of Emotionally Moving Game Experiences. - Julia Ayumi Bopp; Elisa D. Mekler; Klaus Opwis (CHI Extended Abstracts, 2015)

Facets In HCI: Towards Understanding Eudaimonic UX - Preliminary Findings. - Livia J. Müller; Elisa D. Mekler; Klaus Opwis (CHI Extended Abstracts, 2015)

Informational vs. Controlling Gamification: A Study Design. - Seamus F. Forde; Elisa D. Mekler; Klaus Opwis (CHI PLAY, 2015)

Increasing Donating Behavior Through a Game for Change: The Role of Interactivity and Appreciation. - Sharon T. Steinemann; Elisa D. Mekler; Klaus Opwis (CHI PLAY, 2015)

Trust and distrust on the web: User experiences and website characteristics. - Mirjam Seckler; Silvia Heinz; Seamus F. Forde; Alexandre N. Tuch; Klaus Opwis (Comput. Hum. Behav., 2015)

Linking objective design factors with subjective aesthetics: An experimental study on how structure and color of websites affect the facets of users' visual aesthetic perception. - Mirjam Seckler; Klaus Opwis; Alexandre N. Tuch (Comput. Hum. Behav., 2015)

Negative Emotion, Positive Experience?: Emotionally Moving Moments in Digital Games. - Julia Ayumi Bopp; Elisa D. Mekler; Klaus Opwis (CHI, 2016)

Perceived User Experience of Animated Transitions in Mobile User Interfaces. - Benedikt Merz; Alexandre N. Tuch; Klaus Opwis (CHI Extended Abstracts, 2016)

Hedonic Enjoyment and Personal Expressiveness in Positive User Experiences. - Livia J. Müller; Elisa D. Mekler; Klaus Opwis (CHI Extended Abstracts, 2016)

"It's Like I Would Die as Well": Gratifications of Fearful Game Experience. - Sarah I. Endress; Elisa D. Mekler; Klaus Opwis (CHI PLAY (Companion), 2016)

Informational, but not Intrinsically Motivating Gamification': Preliminary Findings. - Seamus F. Forde; Elisa D. Mekler; Klaus Opwis (CHI PLAY (Companion), 2016)

The Winner Gives It All': Preliminary Results on The Role of Game Outcome on the Effectiveness of a Game for Change. - Sharon T. Steinemann; Elisa D. Mekler; Klaus Opwis (CHI PLAY (Companion), 2016)

A Good Reason to Die: How Avatar Death and High Challenges Enable Positive Experiences. - Serge Petralito; Florian Brühlmann; Glena Helen Iten; Elisa D. Mekler; Klaus Opwis (CHI, 2017)

To Save or To Sacrifice?: Understanding Meaningful Choices in Games. - Glena Helen Iten; Sharon T. Steinemann; Klaus Opwis (CHI PLAY (Companion), 2017)

Simple Acts for a Better World: A Gameful System for Prosocial Behavior: Preliminary Design and Research Plan. - Sharon T. Steinemann; Benjamin Geelan; Kristy de Salas; Klaus Opwis (CHI PLAY (Companion), 2017)

Towards understanding the effects of individual gamification elements on intrinsic motivation and performance. - Elisa D. Mekler; Florian Brühlmann; Alexandre N. Tuch; Klaus Opwis (Comput. Hum. Behav., 2017)

Is It Still Where I Expect It? - Users' Current Expectations of Interface Elements on the Most Frequent Types of Websites. - Silvia Heinz; Sebastian Linxen; Alexandre N. Tuch; Lars Fraßeck; Klaus Opwis (Interact. Comput., 2017)

Interactive Narratives Affecting Social Change. - Sharon T. Steinemann; Glena Helen Iten; Klaus Opwis; Seamus F. Forde; Lars Fraßeck; Elisa D. Mekler (J. Media Psychol. Theor. Methods Appl., 2017)

"An Odd Kind of Pleasure": Differentiating Emotional Challenge in Digital Games. - Julia Ayumi Bopp; Klaus Opwis; Elisa D. Mekler (CHI, 2018)

Measuring the "Why" of Interaction: Development and Validation of the User Motivation Inventory (UMI). - Florian Brühlmann; Beat Vollenwyder; Klaus Opwis; Elisa D. Mekler (CHI, 2018)

Choosing to Help Monsters: A Mixed-Method Examination of Meaningful Choices in Narrative-Rich Games and Interactive Narratives. - Glena Helen Iten; Sharon T. Steinemann; Klaus Opwis (CHI, 2018)

Understanding Fitness App Usage Over Time: Moving Beyond the Need for Competence. - Vanessa R. Lerch; Sharon T. Steinemann; Klaus Opwis (CHI Extended Abstracts, 2018)

"In A Good Way Weird": Exploring Positive Experiences with Technology-Mediated Pornography. - Livia J. Müller; Klaus Opwis; Elisa D. Mekler (CHI Extended Abstracts, 2018)

How to Use Plain and Easy-to-Read Language for a Positive User Experience on Websites. - Beat Vollenwyder; Andrea Schneider; Eva Krueger; Florian Brühlmann; Klaus Opwis; Elisa D. Mekler (ICCHP (1), 2018)

Does a prosocial decision in video games lead to increased prosocial real-life behavior? The impact of reward and reasoning. - Glena Helen Iten; Julia Ayumi Bopp; Clemens Steiner; Klaus Opwis; Elisa D. Mekler (Comput. Hum. Behav., 2018)

Aesthetics in Context - The Role of Aesthetics and Usage Mode for a Website's Success. - Glena Helen Iten; Antonin Troendle; Klaus Opwis (Interact. Comput., 2018)

Exploring Emotional Attachment to Game Characters. - Julia Ayumi Bopp; Livia J. Müller; Lena Fanya Aeschbach; Klaus Opwis; Elisa D. Mekler (CHI PLAY, 2019)

Salient beliefs influencing the intention to consider Web Accessibility. - Beat Vollenwyder; Glena Helen Iten; Florian Brühlmann; Klaus Opwis; Elisa D. Mekler (Comput. Hum. Behav., 2019)

My Train Talks to Me: Participatory Design of a Mobile App for Travellers with Visual Impairments. - Beat Vollenwyder; Esther Buchmüller; Christian Trachsel; Klaus Opwis; Florian Brühlmann (ICCHP (1), 2020)

How Web Professionals Perceive Web Accessibility in Practice: Active Roles, Process Phases and Key Disabilities. - Beat Vollenwyder; Klaus Opwis; Florian Brühlmann (ICCHP (1), 2020)

How WEIRD is CHI? - Sebastian Linxen; Christian Sturm 001; Florian Brühlmann; Vincent Cassau; Klaus Opwis; Katharina Reinecke (CHI, 2021)

Transparency in Measurement Reporting: A Systematic Literature Review of CHI PLAY. - Lena Fanya Aeschbach; Sebastian Andrea Caesar Perrig; Lorena Weder; Klaus Opwis; Florian Brühlmann (Proc. ACM Hum. Comput. Interact., 2021)

Breaking immersion: A theoretical framework of alienated play to facilitate critical reflection on interactive media. - Lena Fanya Aeschbach; Klaus Opwis; Florian Brühlmann (Frontiers Virtual Real., 2022)

Exploring the effects of human-centered AI explanations on trust and reliance. - Nicolas Scharowski; Sebastian A. C. Perrig; Melanie Svab; Klaus Opwis; Florian Brühlmann (Frontiers Comput. Sci., 2023)

How compliance with web accessibility standards shapes the experiences of users with and without disabilities. - Beat Vollenwyder; Serge Petralito; Glena Helen Iten; Florian Brühlmann; Klaus Opwis; Elisa D. Mekler (Int. J. Hum. Comput. Stud., 2023)

The psychology of esports players' ELO Hell: Motivated bias in League of Legends and its impact on players' overestimation of skill. - Lena Fanya Aeschbach; Dominik Kayser; Antony Berbert De Castro Hüsler; Klaus Opwis; Florian Brühlmann (Comput. Hum. Behav., 2023)

Independent Validation of the Player Experience Inventory: Findings from a Large Set of Video Game Players. - Sebastian A. C. Perrig; Nicolas Scharowski; Florian Brühlmann; Nick von Felten; Klaus Opwis; Lena Fanya Aeschbach (CHI, 2024)

To Trust or Distrust Trust Measures: Validating Questionnaires for Trust in AI. - Nicolas Scharowski; Sebastian A. C. Perrig; Lena Fanya Aeschbach; Nick von Felten; Klaus Opwis; Philipp Wintersberger; Florian Brühlmann (CoRR, 2024)

Measurement practices in user experience (UX) research: a systematic quantitative literature review. - Sebastian A. C. Perrig; Lena Fanya Aeschbach; Nicolas Scharowski; Nick von Felten; Klaus Opwis; Florian Brühlmann (Frontiers Comput. Sci., 2024)

Zooming in: The role of nonverbal behavior in sensing the quality of collaborative group engagement. - Lisa Paneth; Loris T. Jeitziner; Oliver Rack; Klaus Opwis; Carmen G. Zahn (Int. J. Comput. Support. Collab. Learn., 2024)

Development and Validation of a Positive-Item Version of the Visual Aesthetics of Websites Inventory: The VisAWI-Pos. - Sebastian A. C. Perrig; Nick von Felten; Marimo Honda; Klaus Opwis; Florian Brühlmann (Int. J. Hum. Comput. Interact., 2024)

To Trust or Distrust AI: A Questionnaire Validation Study. - Nicolas Scharowski; Sebastian A. C. Perrig; Nick von Felten; Lena Fanya Aeschbach; Klaus Opwis; Philipp Wintersberger; Florian Brühlmann (FAccT, 2025)

Development and Psychometric Validation of a Positively Worded German Version of the System Usability Scale (SUS). - Sebastian A. C. Perrig; Nick von Felten; Beat Vollenwyder; Klaus Opwis (Int. J. Hum. Comput. Interact., 2025)