Percorrer por autor "Barbosa, F."
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- Effects of emotional valence and three-dimensionality of visual stimuli on brain activation: an fMRI studyPublication . Dores, A. R.; Almeida, I.; Barbosa, F.; Castelo-Branco, M.; Monteiro, L.; Reis, M.; Sousa, L. de; Caldas, A. CastroBACKGROUND: Examining changes in brain activation linked with emotion-inducing stimuli is essential to the study of emotions. Due to the ecological potential of techniques such as virtual reality (VR), inspection of whether brain activation in response to emotional stimuli can be modulated by the three-dimensional (3D) properties of the images is important. OBJECTIVE: The current study sought to test whether the activation of brain areas involved in the emotional processing of scenarios of different valences can be modulated by 3D. Therefore, the focus was made on the interaction effect between emotion-inducing stimuli of different emotional valences (pleasant, unpleasant and neutral valences) and visualization types (2D, 3D). However, main effects were also analyzed. METHODS: The effect of emotional valence and visualization types and their interaction were analyzed through a 3 × 2 repeated measures ANOVA. Post-hoc t-tests were performed under a ROI-analysis approach. RESULTS: The results show increased brain activation for the 3D affective-inducing stimuli in comparison with the same stimuli in 2D scenarios, mostly in cortical and subcortical regions that are related to emotional processing, in addition to visual processing regions. CONCLUSIONS: This study has the potential of clarify brain mechanisms involved in the processing of emotional stimuli (scenarios' valence) and their interaction with three-dimensionality.
- A Radboud Faces Database como ferramenta para o estudo do reconhecimento de emoções - uma investigação em PortugalPublication . Dores, A. R.; Barbosa, F.; Marques, A.; Queirós, C.; Oliveira, M. Q.; Pedroso, J. P.; Castro-Caldas, A.; Carvalho, I. P.Este trabalho tem como objectivo a apresentação de dados normativos do reconhecimento de sete expressões faciais com conteúdo emocional, e uma neutra, de modelos caucasianos adultos, da Radboud Faces Database (Langner et al., 2010). Foram apresentadas 312 faces de 39 atores de ambos os sexos a 1174 estudantes (média de idades = 20.2 anos) de cursos de Tecnologias da Saúde e de Psicologia da ESTSP-IPP e da FPCEUP, numa tarefa de reconhecimento emocional. O acordo médio entre as expressões emocionais apresentadas e as emoções reconhecidas foi de 82% (DP = 10.2). Não se verificou a distinção no reconhecimento emocional em função do sexo do modelo para as emoções no geral, embora algumas expressões emocionais tenham sido melhor reconhecidas em modelos de um sexo do que do outro. O reconhecimento emocional elevado, semelhante ao do estudo original, indica que a RaFD é uma ferramenta adequada para o estudo do reconhecimento de emoções em investigação portuguesa.
- Registered Replication Report: Rand, Greene, and Nowak (2012)Publication . Bouwmeester, S.; Verkoeijen, P. P. J. L.; Aczel, B.; Barbosa, F.; Bègue, L.; Brañas-Garza, P.; Chmura, T. G. H.; Cornelissen, G.; Døssing, F. S.; Espín, A. M.; Evans, A. M.; Ferreira-Santos, F.; Fiedler, S.; Flegr, J.; Ghaffari, M.; Glöckner, A.; Goeschl, T.; Guo, L.; Hauser, O. P.; Hernan-Gonzalez, R.; Herrero, A.; Horne, Z.; Houdek, P.; Johannesson, M.; Koppel, L.; Kujal, P.; Laine, T.; Lohse, J.; Martins, E. C.; Mauro, Carlos; Mischkowski, D.; Mukherjee, S.; Myrseth, K. O. R.; Navarro-Martínez, D.; Neal, T. M. S.; Novakova, J.; Pagà, R.; Paiva, T. O.; Palfi, B.; Piovesan, M.; Rahal, R.-M.; Salomon, E.; Srinivasan, N.; Srivastava, A.; Szaszi, B.; Szollosi, A.; Thor, K. Ø.; Tinghög, G.; Trueblood, J. S.; Van Bavel, J. J.; van ‘t Veer, A. E.; Västfjäll, D.; Warner, M.; Wengström, E.; Wills, J.; Wollbrant, C. E.In an anonymous 4-person economic game, participants contributed more money to a common project (i.e., cooperated) when required to decide quickly than when forced to delay their decision (Rand, Greene & Nowak, 2012), a pattern consistent with the social heuristics hypothesis proposed by Rand and colleagues. The results of studies using time pressure have been mixed, with some replication attempts observing similar patterns (e.g., Rand et al., 2014) and others observing null effects (e.g., Tinghög et al., 2013; Verkoeijen & Bouwmeester, 2014). This Registered Replication Report (RRR) assessed the size and variability of the effect of time pressure on cooperative decisions by combining 21 separate, preregistered replications of the critical conditions from Study 7 of the original article (Rand et al., 2012). The primary planned analysis used data from all participants who were randomly assigned to conditions and who met the protocol inclusion criteria (an intent-to-treat approach that included the 65.9% of participants in the time-pressure condition and 7.5% in the forced-delay condition who did not adhere to the time constraints), and we observed a difference in contributions of -0.37 percentage points compared with an 8.6 percentage point difference calculated from the original data. Analyzing the data as the original article did, including data only for participants who complied with the time constraints, the RRR observed a 10.37 percentage point difference in contributions compared with a 15.31 percentage point difference in the original study. In combination, the results of the intent-to-treat analysis and the compliant-only analysis are consistent with the presence of selection biases and the absence of a causal effect of time pressure on cooperation.