2023
Autores
Melo, M; Gonçalves, G; Vasconcelos Raposo, J; Bessa, M;
Publicação
IEEE ACCESS
Abstract
Presence is often used to evaluate Virtual Reality (VR) applications. However, the raw scores are hard to interpret and need to be compared to other data to be meaningful. This paper leverages a database of 1909 responses to the Igroup Presence Questionnaire (IPQ) in different contexts to put forward a scale that qualitatively interprets raw Presence scores for VR experiences. The qualitative grading encompasses the acceptability dimension and analogous academic grading scales ranging from A to F and the adjective of such scores in a scale from Excellent to Unacceptable. Furthermore, the qualitative grading system encompasses Presence and its subscales Spatial Presence, Involvement, and Experienced Realism as defined by the IPQ. Adopting this grading system, supported by a robust dataset of Presence scores, enables practitioners to evaluate and interpret individual IPQ scores, allowing them to gain insights regarding the evaluated applications' effectiveness.
2024
Autores
Narciso, D; Melo, M; Rodrigues, S; Cunha, JP; Vasconcelos Raposo, J; Bessa, M;
Publicação
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
Abstract
How we perceive and experience the world around us is inherently multisensory. Most of the Virtual Reality (VR) literature is based on the senses of sight and hearing. However, there is a lot of potential for integrating additional stimuli into Virtual Environments (VEs), especially in a training context. Identifying the relevant stimuli for obtaining a virtual experience that is perceptually equivalent to a real experience will lead users to behave the same across environments, which adds substantial value for several training areas, such as firefighters. In this article, we present an experiment aiming to assess the impact of different sensory stimuli on stress, fatigue, cybersickness, Presence and knowledge transfer of users during a firefighter training VE. The results suggested that the stimulus that significantly impacted the user's response was wearing a firefighter's uniform and combining all sensory stimuli under study: heat, weight, uniform, and mask. The results also showed that the VE did not induce cybersickness and that it was successful in the task of transferring knowledge.
2018
Autores
Vasconcelos-Raposo, J; Couto, S; Formiga, N; Teixeira, CM;
Publicação
Actualidades en Psicología
Abstract
2025
Autores
Vasconcelos-Raposo, JJ;
Publicação
PSYCHTECH & HEALTH JOURNAL
Abstract
2025
Autores
Vasconcelos-Raposo, JJ;
Publicação
PSYCHTECH & HEALTH JOURNAL
Abstract
2023
Autores
Pereira, HP; Vasconcelos Raposo, J; Rodrigues Fernandes, H; Almeida, L; Teixeira, CM;
Publicação
REVISTA IBEROAMERICANA DE DIAGNOSTICO Y EVALUACION-E AVALIACAO PSICOLOGICA
Abstract
This study aimed to confirm a factor structure of the Portuguese version of the 9-item Resilience Scale proposed by Siu et al. (2009). Participants were 121 university students, 79 females and 42 males, attending a Portuguese higher education institution, aged between 19 and 31 years (M=20.96; SD=1.96). The results showed that the one-factor model presented good adjustment indicators (& chi;2/df=1.554, CFI=.961, NNFI=.941, GFI=.996, RMSEA=.068, SRMR=.051, AIC=79.004 e MECVI=.690). As for reliability, Cronbach's alpha was .835, and composite reliability .766, both considered acceptable. We conclude that the Portuguese version of the Resilience Scale (ER-9) presents a unifactorial structure pointing to psychometric indicators that justify its application in samples of university students.
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