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Sound-driven enhancement of vision: Disentangling detection from decisional level contributions

  • Authors
  • Pérez-Bellido, A.; Soto-Faraco S.; López-Moliner, J.
  • UPF authors
  • SOTO FARACO, SALVADOR;
  • Type
  • Articles de recerca
  • Journal títle
  • Journal of Neurophysiology
  • Publication year
  • 2013
  • Volume
  • 109
  • Number
  • 4
  • Pages
  • 1065-1077
  • ISSN
  • 0022-3077
  • Publication State
  • Publicat
  • Abstract
  • Cross-modal enhancement can be mediated both by higher-order effects due to attention and decision making and by detection-level stimulus-driven interactions. However, the contribution of each of these sources to behavioral improvements has not been conclusively determined and quantified separately. Here, we apply psychophysical analysis based on Piéron functions in order to separate stimulus-dependent changes from those accounted by decision-level contributions. Participants performed a simple visual speeded detection task on Gabor patches of different spatial frequencies and contrast values, presented with and without accompanying sounds. On one hand, we identified an additive cross-modal improvement in mean reaction times across all types of visual stimuli that would be well explained by interactions not strictly based on stimulus-driven modulations (e.g., due to reduction of temporal uncertainty and motor times). On the other hand, we singled out an audio-visual benefit that strongly depended on stimulus features such as frequency and contrast. This particular enhancement was selective to low-visual spatial frequency stimuli, optimized for magnocellular sensitivity. We therefore conclude that interactions at detection stages and at decisional processes in response selection that contribute to audio-visual enhancement can be separated online and express on partly different aspects of visual processing.
  • Complete citation
  • Pérez-Bellido, A.; Soto-Faraco S.; López-Moliner, J.. Sound-driven enhancement of vision: Disentangling detection from decisional level contributions. Journal of Neurophysiology 2013; 109(4): 1065-1077.
Bibliometric indicators
  • 19 times cited Scopus
  • 19 times cited WOS
  • Índex Scimago de 2.635(2013)