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Details

  • Name

    Maximino Bessa
  • Cluster

    Computer Science
  • Role

    Senior Researcher
  • Since

    01st March 2009
002
Publications

2018

The effects of body position on Reflexive Motor Acts and the sense of presence in virtual environments

Authors
Bessa, M; Melo, M; de Sousa, AA; Raposo, JV;

Publication
Computers and Graphics (Pergamon)

Abstract
The purpose of this study was to measure the subject's sense of presence while they performed a task (riding a bicycle downhill) in a virtual reality (VR) environment and to compare it by body position (standing vs. sitting) and gender. The sample consisted of 35 subjects (19 male and 16 female) between 17 and 33 years of age. A translated and validated Portuguese version of the Igroup Presence Questionnaire (IPQp) and the Reflexive Motor Acts (RMAs), based on direct observation, were used as metrics. The results showed significant differences between body position at the level of Experienced Realism, Spatial Presence and Overall Sense of Presence. When measuring RMAs, it was demonstrated that people in the sitting position presented a higher frequency. We concluded that body position influences perceptions of credibility, which has an impact on the sense of presence. No differences were identified between the genders. © 2017 Elsevier Ltd

2018

Image-type representation: A preliminary study on preferences of users with intellectual disabilities

Authors
Rocha, T; Bessa, M; Bastardo, R; Magalhaes, L;

Publication
INTERNATIONAL JOURNAL OF HUMAN-COMPUTER STUDIES

Abstract
Previous findings have shown that users with intellectual disabilities navigate the Web more easily and with greater interest when images are used to represent hyperlinks (Rocha, 2008; 2014; Rocha et al., 2012). Although images can be better for navigation purposes, there is a need to understand how these images should be designed to enhance users' interaction with digital content for this particular group of people. The purpose of this study is to measure the user's preference for image-type representation (Object, Action and Universe), within four different categories (music, movies, sports, games). The sample consisted of 20 individuals with intellectual disabilities, their ages ranging from 22 to 49 years old. The results showed that they preferred less complex images, namely object representative images, and that categories had no effect.

2018

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

2018

A Conceptual Research Model Proposal of Digital Marketing Adoption and Impact on Low Density Tourism Regions

Authors
Jorge, F; Teixeira, MS; Correia, RJ; Gonçalves, R; Martins, J; Bessa, M;

Publication
Advances in Intelligent Systems and Computing - Trends and Advances in Information Systems and Technologies

Abstract

2018

Tone Mapping HDR Panoramas for Viewing in Head Mounted Displays

Authors
Melo, M; Bouatouch, K; Bessa, M; Coelho, H; Cozot, R; Chalmers, A;

Publication
Proceedings of the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (VISIGRAPP 2018) - Volume 1: GRAPP, Funchal, Madeira, Portugal, January 27-29, 2018.

Abstract

Supervised
thesis

2016

Utilização da resposta fisiológica em ambientes de realidade virtual para aumentar o envolvimento dos utilizadores

Author
Manuel Pinto

Institution
UTAD

2016

MANY-OBJECTIVE OPTIMIZATION WITH PARTICICLE SWARM OPTIMIZATION ALGORITHM

Author
Hélio Alves Freire

Institution
UTAD

2016

DESENVOLVIMENTO DE APLICAÇÕES DE REALIDADE AUMENTADA COERENTES COM O CONTEXTO AMBIENTAL

Author
João Carlos dos Santos Barreira

Institution
UTAD

2016

PROPOSAL OF A NOVEL MULTIMODAL INTERACTION MODEL FOR USERS OF DIFFERENT AGE GROUPS

Author
Diana Carneiro Machado de Carvalho

Institution
UTAD

2016

Ambientes virtuais multissensoriais: equivalência entre treino virtual e real

Author
David  Gonçalves Narciso

Institution
UTAD