Context-Based Interface Prototyping: Understanding the Effect of Prototype Representation on User Feedback

Abstract

The rise of autonomous systems in cities, such as automated vehicles (AVs), requires new approaches for prototyping and evaluating how people interact with those systems through context-based user interfaces, such as external human-machine interfaces (eHMIs). In this paper, we present a comparative study of three prototype representations (real-world VR, computer-generated VR, real-world video) of an eHMI in a mixed-methods study with 42 participants. Quantitative results show that while the real-world VR representation results in higher sense of presence, no significant differences in user experience and trust towards the AV itself were found. However, interview data shows that participants focused on different experiential and perceptual aspects in each of the prototype representations. These differences are linked to spatial awareness and perceived realism of the AV behaviour and its context, affecting in turn how participants assess trust and the eHMI. The paper offers guidelines for prototyping and evaluating context-based interfaces through simulations.

References in corpus (3)

• Designing for Projection-based Communication between Autonomous Vehicles and Pedestrians
• Designing Human-Machine Interactions in the Automated City: Methodologies, Considerations, Principles
• A Tangible Multi-Display Toolkit to Support the Collaborative Design Exploration of AV-Pedestrian Interfaces

Cited by in corpus (5)

• A Review of Virtual Reality Studies on Autonomous Vehicle--Pedestrian Interaction
• Simulating Wearable Urban Augmented Reality Experiences in VR: Lessons Learnt from Designing Two Future Urban Interfaces
• Exploring the Impact of Interconnected External Interfaces in Autonomous Vehicleson Pedestrian Safety and Experience
• Trust and Reliance in Consensus-Based Explanations from an Anti-Misinformation Agent
• Virtual Urban Field Studies: Evaluating Urban Interaction Design Using Context-Based Interface Prototypes