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The Silent Period of Evidence Integration in Fast Decision Making

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  • Johannes Rüter
  • Henning Sprekeler
  • Wulfram Gerstner
  • Michael H Herzog

Abstract

In a typical experiment on decision making, one out of two possible stimuli is displayed and observers decide which one was presented. Recently, Stanford and colleagues (2010) introduced a new variant of this classical one-stimulus presentation paradigm to investigate the speed of decision making. They found evidence for “perceptual decision making in less than 30 ms”. Here, we extended this one-stimulus compelled-response paradigm to a two-stimulus compelled-response paradigm in which a vernier was followed immediately by a second vernier with opposite offset direction. The two verniers and their offsets fuse. Only one vernier is perceived. When observers are asked to indicate the offset direction of the fused vernier, the offset of the second vernier dominates perception. Even for long vernier durations, the second vernier dominates decisions indicating that decision making can take substantial time. In accordance with previous studies, we suggest that our results are best explained with a two-stage model of decision making where a leaky evidence integration stage precedes a race-to-threshold process.

Suggested Citation

  • Johannes Rüter & Henning Sprekeler & Wulfram Gerstner & Michael H Herzog, 2013. "The Silent Period of Evidence Integration in Fast Decision Making," PLOS ONE, Public Library of Science, vol. 8(1), pages 1-7, January.
    • Handle: RePEc:plo:pone00:0046525
    DOI: 10.1371/journal.pone.0046525
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    References listed on IDEAS

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    1. Adam Kepecs & Naoshige Uchida & Hatim A. Zariwala & Zachary F. Mainen, 2008. "Neural correlates, computation and behavioural impact of decision confidence," Nature, Nature, vol. 455(7210), pages 227-231, September.
    2. Johannes Rüter & Nicolas Marcille & Henning Sprekeler & Wulfram Gerstner & Michael H Herzog, 2012. "Paradoxical Evidence Integration in Rapid Decision Processes," PLOS Computational Biology, Public Library of Science, vol. 8(2), pages 1-10, February.
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