Contributions to CHI 2021

2 May 2021

Our group contributes this year 4 full papers and various late breaking works, workshop papers and demonstrations to the ACM CHI Conference on Human Factors in Computing Systems.

Full Papers

PriView: We present and evaluate a concept to visualize privacy-invasive devices in users’ vicinity. In particular, we contribute (a) a mobile application, capable of detecting smart devices using a thermal camera and (b) a VR application presenting suitable scenarios.

Sarah Prange, Ahmed Shams, Robin Piening, Yomna Abdelrahman and Florian Alt. PriView – Exploring Visualisations Supporting Users' Privacy Awareness. In Proceedings of the 2021 CHI Conference on Human Factors in Computing Systems. CHI'21. Association for Computing Machinery, New York, NY, USA. [Download Bibtex] [Presentation Video]

Effects of Body Normalizations on Behavioral Biometrics: In this paper we investigate how well users can be identified in VR in realistic, task-driven scenarios using spatial movements. In particular, we investigate the role of users’ physiology by virtually altering and normalizing their body proportions, showing that by doing so the identification accuracy can be enhanced by 38%.

Jonathan Liebers, Uwe Gruenefeld, Lukas Mecke, Alia Saad, Jonas Auda, Florian Alt, Mark Abdelaziz and Stefan Schneegass. Understanding User Identification in Virtual Reality through Behavioral Biometrics and the Effect of Body Normalization. In Proceedings of the 2021 CHI Conference on Human Factors in Computing Systems. CHI'21. Association for Computing Machinery, New York, NY, USA. [Download Bibtex] [Presentation Video]

SpatialProto: This paper presents SpatialProto, an in-situ spatial prototyping system for mixed reality, which lowers the barrier for designers to engage in spatial prototyping. SpatialProto lets users record animated objects of the real world, extract relevant elements, and directly place and transform these recordings in their physical environment.

Leon Müller, Ken Pfeuffer, Jan Gugenheimer, Sarah Prange, Bastian Pfleging and Florian Alt. SpatialProto: Using Real-World Captures for Rapid Prototyping of Mixed Reality Experiences. In Proceedings of the 2021CHI Conference on Human Factors in Computing Systems. CHI'21. Association for Computing Machinery, New York, NY, USA. [Download Bibtex] [Presentation Video]

Hidden Interactions: We present and explore the concept of hidden interaction techniques which supports interaction in situations in which the use of personal devices is not socially acceptable or where nearby people present a privacy risk. In particular, two applications are presented and evaluated. HiddenHaptic conveys information through vibrotactile cues on smartphones. HiddenWrite allows text messages to be composed on smart watches.

Ville Mäekelä, Johannes Kleine, Maxine Hood, Florian Alt and Albrecht Schmidt. Hidden Interaction Techniques: Concealed Information Acquisition and Texting on Smartphones and Wearables. In Proceedings of the 2021 CHI Conference on Human Factors in Computing Systems. CHI'21. Association for Computing Machinery, New York, NY, USA. [Download Bibtex] [Presentation Video]

Late Breaking Works, Workshop Papers and Demonstrations

	Sarah Delgado Rodriguez, Sarah Prange, Lukas Mecke and Florian Alt. ActPad – A Smart Desk Platform to Enable User Interaction with IoT Devices. In Extended Abstracts of the 2021 CHI Conference on Human Factors in Computing Systems. CHIEA'21. ACM, New York, NY, USA. [Download Bibtex] [Presentation Video]
	Yasmeen Abdrabou, Yomna Abdelrahman, Mohamed Khamis and Florian Alt. Think harder! Investigating the Effect of Password Strength on Cognitive Load during Password Creation. In Extended Abstracts of the 2021 CHI Conference on Human Factors in Computing Systems. CHIEA'21. ACM, New York, NY, USA. [Download Bibtex] [Presentation Video]
	Felix Dietz, Matthias Hoppe, Jakob Karolus, Paweł W. Wozniak, Albrecht Schmidt and Tonja Machulla. VRsneaky: Stepping into an Audible Virtual World with Gait-Aware Auditory Feedback. In Extended Abstracts of the 2020 CHI Conference on Human Factors in Computing Systems. CHI EA '20. Association for Computing Machinery, New York, NY, USA. [Download Bibtex] [Presentation Video]
	Sarah Prange, Karola Marky and Florian Alt. Usable Authentication in Multi-Device Ecosystems. In Proceedings of the CHI 2021 Workshop on User Experience for Multi-Device Ecosystems: Challenges and Opportunities. UX4MDE '21. [Download Bibtex]