Perceptual development

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Author:
pntaub
ID:
182571
Filename:
Perceptual development
Updated:
2012-11-11 19:45:02
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Perceptual lecture 10 motion event perception
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Perceptual: lecture 10/10 motion and event perception
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  1. purpose of motion perception
    For adults, the main purpose of motion perception is to guide movement. 

    For infants who can’t move, the main purpose is to learn about the environment. 

    Motion provides information about the stable properties of the environment. 

    Motion informs us about changes and events. 

    We need motion perception to meet our basic needs: move toward food, avoid danger, approach comfort.
  2. Temporal Resolution
    Your ability to resolve the onset and offset of stimulus changes in order to detect change and motion
  3. Critical Flicker Frequency
    The highest frequency at which a flicker can be detected
  4. what is the CFF rate for adults?
    60Hz (60 cycles of on/off per second)
  5. electroretinogram
    a electrophysiological indicator of retinal activity
  6. Optical Displacement
    For a stationary observer, a target translating perpendicular to the line of sight produces a continuously changing projective location

    Can be measured using a displacement threshold – the smallest amplitude of oscillation of a target, which gives rise to the perception of movement
  7. motion direction sensitivity
    it is important for us to detect motion in space

    Infants are sensitive to motion but are not really good with direction when they are really young (until 6-8 weeks)
  8. Velocity Sensitivity
    the slowest movement that is detectable

    velocity sensitivity for infants are poorer than in adults
  9. optical pursuit
  10. stroboscopic motion
  11. induced motion
  12. object permanence

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