Spatiotemporal dynamics of attention: formalization and flash-lag phenomena

• Processo: 06/50189-9
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Data de Início da vigência: 01 de junho de 2006
• Data de Término da vigência: 31 de maio de 2009
• Área de conhecimento: Ciências Biológicas - Fisiologia - Fisiologia de Órgãos e Sistemas
• Pesquisador responsável: Marcus Vinícius Chrysóstomo Baldo
• Beneficiário: Peter Maurice Erna Claessens
• Instituição Sede: Instituto de Ciências Biomédicas (ICB). Universidade de São Paulo (USP). São Paulo , SP, Brasil
• Assunto(s): Atenção visual Percepção espacial Modelos matemáticos
• Palavra(s)-Chave do Pesquisador: Atencao | Efeito Flash-Lag | Modelagem Matematica | Percepcao Visual

Resumo

The nature of the spatial distribution of attention across the visual field is still a hotly debated topic. Mathematical modeling in this field, especially when temporal dynamics are included, is in an early stage. Yet, a more thorough knowledge of the spatiotemporal properties of attention is necessary to advance the understanding of its role in the flash-lag effect (FLE). The FLE is a visual illusion in which an observer perceives the position of an abrupt stationary flash as being behind a continuously moving object at the same location. In this project, we propose a generic model of spatiotemporal distribution of attention that will guide the interpretation of experimental data from a paradigm designed to explore spatiotemporal attentional dynamics in a simple display with two flashes. In Experiment 1, we investigate the speed of attentional reallocation for flashes with a fixed distance. In Experiment 2, we introduce manipulations to test whether attentional reallocation is slowed by larger distances. In Experiment 3, we make the connection to the FLE in a paradigm that involves a continuously present stimulus element, to be compared with a flash at different distances. The data will serve to scrutinize the interaction between endogenously maintained attention and exogenously drawn attention. Conclusions lead to predictions about the magnitude of the FLE under different conditions. We seek to eventually extend the dynamics of the FLE to similar phenomena that are non-spatial in nature. (AU)

Publicações científicas

(Referências obtidas automaticamente do Web of Science e do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores)

CRAVO, ANDRE M.; CLAESSENS, PETER M. E.; BALDO, MARCUS V. C.. Voluntary action and causality in temporal binding. Experimental Brain Research, v. 199, n. 1, p. 95-99, OCT 2009. (05/60461-5, 06/50189-9)

CLAESSENS, PETER M. E.; PEREIRA, LUCAS OLIVEIRA; BALDO, MARCUS VINICIUS C.. Modulation of perceived contrast in the brightness comparison of asynchronous stimuli. ATTENTION PERCEPTION & PSYCHOPHYSICS, v. 77, n. 1, p. 234-248, JAN 2015. (06/50189-9)