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Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Psychophysics

Background:

  • Time and space perception are fundamentally intertwined.
  • Previous research indicates that stimulus size influences perceived duration, even with illusory size differences.
  • Visual-spatial illusions offer a unique way to probe the relationship between size and time processing.

Purpose of the Study:

  • To investigate how visual-spatial illusions affect duration judgments.
  • To determine if illusory size impacts temporal processing similarly to physical size.
  • To examine the timing of size-time interference within the perceptual stream.

Main Methods:

  • Utilized a temporal reproduction paradigm to assess duration judgments.
  • Induced the Ebbinghaus illusion (Experiment 1) and the horizontal-vertical illusion (Experiment 2).
  • Presented illusions during either the encoding or reproduction phase of the target time interval.

Main Results:

  • Illusory size significantly affected temporal processing, mirroring effects of physical size.
  • The impact of illusory size on duration judgments was consistent whether the illusion occurred during encoding or reproduction.
  • Demonstrated a bidirectional interference between size and temporal processing.

Conclusions:

  • Illusory size influences time perception in a manner analogous to physical size.
  • The interaction between size and time processing is robust and occurs irrespective of the illusion's presentation timing.
  • Suggests a relatively late stage of processing where size and time information interfere.