Data/hora: 04/06/2024 01:01:30

Provedor de dados: | 56
País: | Brazil
Título: | Modulation of the perception of temporal order by attentional and pre-attentional factors
Autores: | Haddad Jr.,H.; Carreiro,L.R.R.; Baldo,M.V.C.
Data: | 2002-08-01
Ano: | 2002
Palavras-chave: | Temporal order judgment; Attention; Visual perception; Psychophysics.
Resumo: | When two stimuli are presented simultaneously to an observer, the perceived temporal order does not always correspond to the actual one. In three experiments we examined how the location and spatial predictability of visual stimuli modulate the perception of temporal order. Thirty-two participants had to report the temporal order of appearance of two visual stimuli. In Experiment 1, both stimuli were presented at the same eccentricity and no perceptual asynchrony between them was found. In Experiment 2, one stimulus was presented close to the fixation point and the other, peripheral, stimulus was presented in separate blocks in two eccentricities (4.8º and 9.6º). We found that the peripheral stimulus was perceived to be delayed in relation to the central one, with no significant difference between the delays obtained in the two eccentricities. In Experiment 3, using three eccentricities (2.5º, 7.3º and 12.1º) for the presentation of the peripheral stimulus, we compared a condition in which its location was highly predictable with two other conditions in which its location was progressively less predictable. Here, the perception of the peripheral stimulus was also delayed in relation to the central one, with this delay depending on both the eccentricity and predictability of the stimulus. We argue that attentional deployment, manipulated by the spatial predictability of the stimulus, seems to play an important role in the temporal order perception of visual stimuli. Yet, under whichever condition of spatial predictability, basic sensory and attentional processes are unavoidably entangled and both factors must concur to the perception of temporal order.
Tipo: | Info:eu-repo/semantics/other
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000800016
Editor: | Associação Brasileira de Divulgação Científica
Relação: | 10.1590/S0100-879X2002000800016
Formato: | text/html
Fonte: | Brazilian Journal of Medical and Biological Research  v.35 n.8 2002
Fonte: | info:eu-repo/semantics/openAccess