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Area of Science:

  • Cognitive Psychology
  • Psychophysics

Background:

  • Perceptual judgments of magnitude (time, number, length) can be influenced by external stimuli.
  • Previous research suggests auditory stimuli can modulate temporal perception.

Purpose of the Study:

  • To investigate the impact of a click train on the bisection of time, number, and length.
  • To determine if this effect differs between sequential and non-sequential stimulus presentation.

Main Methods:

  • Participants performed time, number, and length bisection tasks.
  • A click train was presented concurrently or separately from the stimuli.
  • Bisection points were analyzed to assess perceptual shifts.

Main Results:

  • Click trains shifted time bisection leftward, indicating perceived duration was longer.
  • For sequentially presented number and length, click trains also caused leftward shifts, suggesting greater perceived quantity.
  • This effect was not observed for non-sequentially presented number and length.

Conclusions:

  • The click train's influence on magnitude judgments is modality-dependent and presentation-order dependent.
  • Findings suggest an accumulator process, rather than an internal clock, underlies the click-related lengthening effect for sequentially presented quantities.