INFLUENCE OF TEMPORAL CONTEXT IN TWO-CHOICE TIME DISCRIMINATION

  • Charles Viau-Quesnel
  • Cindy Chamberland
  • Sébastien Tremblay
  • Claudette Fortin

Abstract

Participants were asked to respond as quickly as possible in a two-choice time discrimination task. The short tone (ST) duration was constant across blocks of trials, whereas the long tone (LT) duration varied between blocks. In principle, response time to the ST could be independent of LT duration, as one could decide that the tone is long as soon as the subjective duration corresponding to the ST is over. The results showed instead that as the LT lengthened, reactions times to the ST decreased and reaction times to the LT increased. Performance was more accurate at longer LTs. Errors were found mostly with the ST when reaction times were shorter, whereas errors in late responses were as frequent with the long and short tones; this pattern of results was modulated by LT duration. Our findings show a strong influence of temporal context, even in a simple two-choice time discrimination task.

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