Explaining visual illusions

• What is size constancy in visual perception?

  Objects perceived as constant size despite distance
• How does size constancy affect visual perception?

  It maintains perceived size despite retinal changes
• What are misinterpreted depth cues?

  Depth cues causing visual illusions of size
• How does the Ponzo illusion work?

  Converging lines create an illusion of distance
• In the Ponzo illusion, what happens to the top line?

  It is mentally enlarged by the brain
• What is the Müller-Lyer illusion?

  Illusion based on fins altering perceived distance
• How do ingoing fins affect perception in the Müller-Lyer illusion?

  They make the shape appear closer and scaled down
• How do outgoing fins affect perception in the Müller-Lyer illusion?

  They make the shape appear further away and scaled up
• What are ambiguous figures in visual perception?

  Images with two possible interpretations
• What happens when viewing ambiguous figures?

  The brain can't decide which interpretation is correct
• How can the Necker cube be perceived?

  As pointing upwards to the right or downwards to the left
• What is fiction in visual perception?

  Seeing something that is not there
• How does the Kanizsa triangle create an illusion?

  Illusory contours create the impression of a triangle
• What are the key concepts of visual illusions discussed?

  • Size constancy
  • Misinterpreted depth cues
  • Ponzo illusion
  • Müller-Lyer illusion
  • Ambiguous figures
  • Necker cube
  • Fiction
  • Kanizsa triangle