September 2019
Volume 19, Issue 10
Open Access
Vision Sciences Society Annual Meeting Abstract  |   September 2019
The spatiotemporal dynamic of attention in normal reading
Author Affiliations & Notes
  • Augustin Achouline
    Psychologie, Université de Montréal
Journal of Vision September 2019, Vol.19, 78a. doi:https://doi.org/10.1167/19.10.78a
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      Augustin Achouline; The spatiotemporal dynamic of attention in normal reading. Journal of Vision 2019;19(10):78a. https://doi.org/10.1167/19.10.78a.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Past decades have seen multiplicate many studies examining the cognitive and neurobiological aspects of reading. However, the strategy underlying expert word identification and the way visuospatial attention is deployed across time and space is still unknown. The study from Blais and al. (2009) represent a significant advance in the knowledge of these process. This article pursues their investigation by using a protocol able to precise how visual words information extraction process across time on neurotypicals readers. 16 students were tested using « Bubble » technique. They read five letters french words sampled in space-time within a 200 ms windows on a computer’s screen. First, a signal/noise ratio modulation phase of 150 words was executed to maintain 51% of accuracy. Then, 4 blocs of 150 words each were completed followed by another 75 words modulation bloc. Finally, a block of 150 words was proposed. Data analyses examine how the temporally varying signal/noise ratio determine the response accuracy of participants. Classification images in the temporal domain were constructed for average and each individual by subtracting the weighted sum of the temporal profiles of signal/noise ratios of incorrect trials from those associated with the correct answer. We also constructed classification images in the time-frequency domain which indicate the magnitude of particular frequencies as a function of time. All these classification images were transformed into Z scores to put the images of all participants on the same scale. Statistical significance was determined by the application of the Pixel test. Results tend to reveal a serial processing of letter extraction information in which the order of letter is a function of the diagnostic value of that letter for word identification. These observations are opposed to the parallel processing that is generally accepted as an interpretation of the invariance of latency in expert word reading.

Acknowledgement: Martin Arguin 
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