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Lesson 1 visual illusion

Visual Illusions

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Lesson 1 visual illusion

  1. 1. Lesson 1: Visual Illusions
  2. 2. Question from last lesson Suggest a possible explanation of the difference between taste and flavour (2marks).
  3. 3. Answer: Taste refers to the primary underlying sensations derived from food; whether the substance has the basic characteristics of sweet, salty, sour, bitter or umami. (1 mark) Flavour imparts more complex and subtle differences in the perception, providing more detailed information such as chocolatey, smoky, tangy etc. Flavour gives taste its descriptive characteristics. (1 mark)
  4. 4. Learning Intentions (What you need to know and be able to do) • Explain distortions of visual perception by illusions, including Muller Lyer and Ames room • Describe the structural features (design) of the Ames room and explain why the illusion of changing size is brought about by varying distance • Evaluate explanations of the Muller-Lyer illusion including biological, psychological and social perspective
  5. 5. A perceptual distortion involves an inconsistency, or ‘mismatch’, between a perceptual experience and physical reality.

  6. 6. Visual illusions are NOT • Ambiguous figures, which are images which can be perceived in two different ways due to a shift in attention. • Delusions, which are false beliefs • Hallucinations, which are perceptions that do not actually exist These are hundreds of visual illusions, which can be fun and interesting to look at. For the purposes of VCE psychology you need to know in detail about two of the most widely studies illusions called the Muller-Lyer illusion and the Ames room illusion
  7. 7. Muller-Lyer illusion
  8. 8. Explanations from the Biological perspective Eye Movement theory - Rejected It may be the case that we have an inborn tendency to misperceive simple geometric patterns when they are viewed in a two-dimensional form. Or put more simply - we are born to perceive in 3D not 2D
  9. 9. Psychological perspective Carpentered world hypothesis. This explanation proposes that the illusion occurs because of its similarity to familiar architectural features in the real three- dimensional world we experience as part of everyday life
  10. 10. Social Perspective When shown the Müller-Lyer illusion, these Zulus are more likely to view the lines in their actual two-dimensional forms and therefore perceive the lines as equal in length. Zulus who live in tribal communities within remote areas of Africa. These Zulus live in circular houses with roundish doors
 and domed roofs — without all the familiar angles, corners and edges of our Western three-dimensional world.
  11. 11. Ames Room

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Visual Illusions

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