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  Native and learned sources for expectations: exogenous and endogenous shifting of temporal attention

Breska, A., & Deouell, D. (2011). Native and learned sources for expectations: exogenous and endogenous shifting of temporal attention. Journal of Molecular Neuroscience, 45(Supplement 1), S22.

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Genre: Meeting Abstract

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 Urheber:
Breska, A1, Autor           
Deouell, DY, Autor
Affiliations:
1External Organizations, ou_persistent22              

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 Zusammenfassung: Predicting the timing of upcoming events is crucial for both perception and action, as it has been shown that temporal preparation facilitates response time, accuracy and perception thresholds to a stimulus. The prevalent explanation for this effect is that it reflects increased allocation of attentional resources at the expected moment in time. There is evidence that this shifting of attention can be based on two levels of information. One level, 'low-level' expectation, is based on some regular temporal pattern preceding the target (e.g. stimuli at a fixed rhythm). Another, 'high-level' expectation, is based on abstract knowledge regarding target timing (e.g. association with a previous stimulus). In the current work, we examined the interactions of high-level and low-level temporal expectation on performance in a visual detection task. Subjects responded to a target that appeared in either short or long SOA after a sequence of flickering stimuli. In alternate blocks, flicker frequency or sequence color were predictive of the ISI between the sequence and the target. Subjects were instructed to attend the predictive cue. In some trials (incongruent trials) the target appeared in the SOA which was unpredicted by the attended cue. Orthogonally, the unattended cue could be congruent with the target SOA. We found an effect of congruity of the attended cue, which indicates facilitation by temporal expectation. This effect was modulated by the congruity of the unattended cue, with better performance in incongruent trials when the target SOA was congruent rather than incongruent with the unattended cue. Further, our results demonstrate the superiority of low-level expectations in these effects. Stronger automatic expectation by the low-level cue may result from it being more native to the observer, and not dependant on task-specific associations.

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 Datum: 2011-01
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.1007/s12031-011-9491-9
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Veranstaltung

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Titel: 19th Annual Meeting of the Israel Society for Neuroscience (ISfN 2010)
Veranstaltungsort: Eilat, Israel
Start-/Enddatum: 2010-12-12 - 2010-12-14

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Quelle 1

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Titel: Journal of Molecular Neuroscience
  Andere : Journal of Molecular Neuroscience
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Cambridge, MA : Birkhäuser Boston
Seiten: - Band / Heft: 45 (Supplement 1) Artikelnummer: - Start- / Endseite: S22 Identifikator: ISSN: 0895-8696
CoNE: https://pure.mpg.de/cone/journals/resource/954925560555