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Perceptual Constancy01:12

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Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
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Factors Affecting Perception01:25

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Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
An illustrative example of a perceptual set is the scenario where an airline pilot told...
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Related Experiment Video

Updated: Jul 11, 2025

A Two-interval Forced-choice Task for Multisensory Comparisons
07:13

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Does cross-modal correspondence modulate modality-specific perceptual processing? Study using timing judgment tasks.

Kyuto Uno1,2,3, Kazuhiko Yokosawa4,5

  • 1Department of Psychology, Graduate School of Humanities and Sociology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. kunopsy@gmail.com.

Attention, Perception & Psychophysics
|November 6, 2023
PubMed
Summary
This summary is machine-generated.

Cross-modal correspondences do not alter visual perceptual timing. Audiovisual congruency effects in temporal order judgment tasks likely stem from response bias, not changes in visual processing.

Keywords:
Cross-modal correspondenceSimultaneity judgmentTemporal order judgmentTiming perception

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Psychophysics

Background:

  • Cross-modal correspondences link features across senses, influencing reaction times.
  • Previous research suggests these correspondences modulate sensory processing, but the mechanism remains unclear.

Purpose of the Study:

  • To investigate if audiovisual correspondences affect visual perceptual timing.
  • To differentiate between changes in perceptual processing and response bias.

Main Methods:

  • Two psychophysical tasks: temporal order judgment (TOJ) and simultaneous judgment (SJ).
  • Manipulation of audiovisual congruency between auditory pitch and visual stimuli (location, size).
  • Measurement of points of subjective simultaneity (PSS) for visual stimuli.

Main Results:

  • Audiovisual correspondence shifted PSS in the TOJ task.
  • No effect of audiovisual correspondence on PSS in the SJ task.
  • Differences attributed to response bias in the TOJ task.

Conclusions:

  • Audiovisual correspondences do not modulate visual perceptual timing.
  • Congruency effects in prior studies may be driven by response bias, not altered modality-specific processing.