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Details

  • Name

    José Vasconcelos Raposo
  • Cluster

    Computer Science
  • Role

    Research Coordinator
  • Since

    01st April 2015
002
Publications

2023

How much Presence is enough? Qualitative scales for interpreting the Igroup Presence Questionnaire score

Authors
Melo, M; Gontalves, G; Vasconcelos-Raposo, J; Bessa, M;

Publication
IEEE ACCESS

Abstract

2022

Do Multisensory stimuli benefit the virtual reality experience? A systematic review

Authors
Melo, M; Goncalves, G; Monteiro, P; Coelho, H; Vasconcelos Raposo, J; Bessa, M;

Publication
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS

Abstract

2022

Evaluation of the impact of different levels of self-representation and body tracking on the sense of presence and embodiment in immersive VR

Authors
Goncalves, G; Melo, M; Barbosa, L; Vasconcelos Raposo, J; Bessa, M;

Publication
VIRTUAL REALITY

Abstract
The main goal of this paper is to investigate the effect of different types of self-representations through floating members (hands vs. hands + feet), virtual full body (hands + feet vs. full-body avatar), walking fidelity (static feet, simulated walking, real walking), and number of tracking points used (head + hands, head + hands + feet, head + hands + feet + hip) on the sense of presence and embodiment through questionnaires. The sample consisted of 98 participants divided into a total of six conditions in a between-subjects design. The HTC Vive headset, controllers, and trackers were used to perform the experiment. Users were tasked to find a series of hidden objects in a virtual environment and place them in a travel bag. We concluded that (1) the addition of feet to floating hands can impair the experienced realism (p = 0.039), (2) both floating members and full-body avatars can be used without affecting presence and embodiment (p > 0.05) as long as there is the same level of control over the self-representation, (3) simulated walking scores of presence and embodiment were similar when compared to static feet and real walking tracking data (p > 0.05), and (4) adding hip tracking overhead, hand and feet tracking (when using a full-body avatar) allows for a more realistic response to stimuli (p = 0.002) and a higher overall feeling of embodiment (p = 0.023).

2019

Adaptation and Validation of the Temple Presence Inventory in a Portuguese Population

Authors
Vasconcelos Raposo, J; Bessa, M; Teixeira, CM; Cabral, L; Melo, M;

Publication
INTERNATIONAL JOURNAL OF HUMAN-COMPUTER INTERACTION

Abstract

2019

Adaptation and Validation of the ITC - Sense of Presence Inventory for the Portuguese language

Authors
Vasconcelos Raposo, J; Melo, M; Teixeira, C; Cabra, L; Bessa, M;

Publication
INTERNATIONAL JOURNAL OF HUMAN-COMPUTER STUDIES

Abstract