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Related Experiment Videos

Textured backgrounds alter perceived speed.

M R Blakemore1, R J Snowden

  • 1School of Psychology, Cardiff University, Wales, UK.

Vision Research
|May 29, 2000
PubMed
Summary
This summary is machine-generated.

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Object contrast significantly affects perceived speed, especially on uniform backgrounds. However, textured backgrounds can reduce or eliminate this effect, potentially by enhancing target visibility and introducing second-order motion signals.

Area of Science:

  • Visual perception
  • Motion perception
  • Psychophysics

Background:

  • Perceived speed is influenced by object luminance contrast and background texture.
  • Understanding these factors is crucial for visual processing research.

Purpose of the Study:

  • To investigate the effect of object contrast on perceived speed across backgrounds of varying textures and contrasts.
  • To explore the mechanisms underlying the interaction between object contrast, background texture, and perceived speed.

Main Methods:

  • Experiments involved presenting targets with varying luminance contrast moving over homogenous and textured backgrounds of different contrasts.
  • Participant judgments of perceived speed were recorded.

Main Results:

Related Experiment Videos

  • Object contrast strongly influenced perceived speed over homogenous backgrounds.
  • This effect was reduced or abolished when targets moved over textured backgrounds.
  • Higher contrast backgrounds increased perceived speed and diminished contrast-specific effects.

Conclusions:

  • Textured backgrounds may enhance target visibility and introduce second-order motion cues, modulating the impact of object contrast on perceived speed.
  • Two distinct processes appear to influence perceived speed: a general effect of background contrast and a specific interaction with object contrast.