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André Tomás Ribeiro

dblp:425/2614 · DBLP profile ↗
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1ranked-venue papers
0as first author
1since 2021 · last 2025
0009-0008-7464-6601ORCID · reported

Domains — the database's venue-derived domains; a paper can count in several

Graphics, computer vision, multimedia, augmented reality and games · 1 · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Human-computer interaction and pervasive computing
1 paper
Immersive interaction · 50% Usability and user experience research · 50%
Computer graphics and multimedia
1 paper
Virtual and augmented reality · 100%

Topics — the 3 heaviest of 3, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Usability and user experience research › quality of experience
motion sickness and presence
0.912025
Walking-with-Portals vs. Teleport in VR: Why Walking and Portals Matter in Small Spaces · ACM Multimedia 2025
Immersive interaction
virtual reality locomotion
0.912025
Walking-with-Portals vs. Teleport in VR: Why Walking and Portals Matter in Small Spaces · ACM Multimedia 2025
Virtual and augmented reality › navigation
virtual environment navigation
0.312025
Walking-with-Portals vs. Teleport in VR: Why Walking and Portals Matter in Small Spaces · ACM Multimedia 2025

Methods — techniques the papers use, named apart from their topics

user study · 1.7
YearPublicationVenuePosition
2025 Walking-with-Portals vs. Teleport in VR: Why Walking and Portals Matter in Small Spaces
abstract
Teleportation dominates Virtual Reality (VR) locomotion, known for its efficiency and ease of use, particularly in small physical spaces where users have limited room to move. However, is efficiency the only metric that matters? In this study, we challenge this well-established technique by comparing teleportation with an alternative approach for navigating constrained spaces: Walking-with-Portals. We conducted a user study (N = 24) comparing both techniques, collecting data on orientation, cybersickness, presence, and immersion. Our results reveal a distinct trade-off: Teleportation proved significantly faster, more efficient for pathfinding, and induced less cybersickness. Conversely, Walking-with-Portals significantly enhanced users' sense of spatial presence and perceived control over their movement. While a majority preferred Teleportation for the task's efficiency, 91.7% of participants identified Walking-with-Portals as the more immersive technique. Additionally, we establish key design guidelines for intuitive portal placement that allow a large virtual environment to fit within the small play areas (about 2.5 × 2.5 meters) common to home VR users. Our findings suggest that while teleportation remains the default solution in VR locomotion, Walking-with-Portals provides unique benefits that should not be overlooked. This work invites a reflection on locomotion in VR, arguing that the future of VR navigation may go beyond teleport.
Ana Rita Rebelo, Pedro Ferreira 0003, André Tomás Ribeiro, Rui Nóbrega
ACM Multimedia3