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Yukihiro Morimoto1, Shogo Makioka2

  • 1Department of Sustainable System Sciences, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan. yukihiro316@gmail.com.

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Serial dependence, the bias from past perceptions, is stronger when a response is made in the previous trial. This suggests higher-level processing influences current estimations, but doesn't improve accuracy.

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Area of Science:

  • Cognitive psychology
  • Perceptual decision-making

Background:

  • Perceptions are influenced by past experiences, a phenomenon known as serial dependence.
  • The impact of prior response actions on serial dependence strength remains unclear.

Purpose of the Study:

  • To investigate how response execution in a preceding trial affects serial dependence during numerosity estimation.
  • To determine if serial dependence influences the accuracy of numerosity estimation.

Main Methods:

  • Participants performed a numerosity estimation task involving dot arrays.
  • Serial dependence was compared between trials with and without a prior response.

Main Results:

  • Attractive serial dependence was significantly stronger when participants executed a response in the preceding trial compared to merely observing the stimulus.
  • No correlation was found between the magnitude of serial dependence and numerosity estimation accuracy.

Conclusions:

  • Response execution appears to enhance serial dependence, indicating that prior stimulus information must engage higher-level decision processes to bias current perception.
  • Serial dependence does not seem to improve performance or accuracy in numerosity estimation tasks.