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Primed and unprimed rebounding illusory apparent motion.

Nicolas Davidenko1, Nathan H Heller2

  • 1Department of Psychology, University of California, Santa Cruz, CA, USA. ndaviden@ucsc.edu.

Attention, Perception & Psychophysics
|January 18, 2018
PubMed
Summary

Illusory motion perception can default to rebounding motion, especially with longer frame durations. Different prime types reveal distinct temporal structures in rebounding percepts, suggesting underlying oscillatory processes.

Keywords:
AdaptationAftereffectsApparent motionPriming

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Area of Science:

  • Visual perception
  • Motion perception
  • Psychophysics

Background:

  • Illusory motion can be perceived from random dot sequences, including translation, rotation, and rebounding motion.
  • Previous studies primarily used forced-choice tasks, limiting the measurement of unidirectional priming effects.

Purpose of the Study:

  • To investigate if unidirectional motion priming can lead to illusory rebounding motion perception.
  • To explore the influence of frame duration on illusory motion perception.
  • To compare the temporal structures of rebounding percepts elicited by different prime types.

Main Methods:

  • Experiment 1: Participants were primed with unidirectional motion and allowed to report rebounding motion.
  • Experiment 2: Compared rebounding percepts following unidirectional versus bidirectional primes.
  • Measured illusory motion percepts under varying frame durations.

Main Results:

  • Unidirectional motion priming frequently resulted in reported rebounding motion.
  • Rebounding percepts were more common with longer frame durations, suggesting attentional involvement.
  • Systematic differences in temporal structures were observed between rebounding percepts from unidirectional and bidirectional primes.

Conclusions:

  • Unidirectional motion can default to a rebounding percept, potentially due to an underlying oscillatory state.
  • Rebounding percepts following bidirectional primes may involve initialization or entrainment of an oscillatory process.
  • Attention plays a role in the formation and maintenance of illusory motion percepts.