1. Sensation
    the detection of physical energy through sense organs
  2. transduction
    Conversion of stimulus to electrical signal
  3. perception
    the brain's interpretation of raw senosry input
  4. Sensory adaption
    a stimulus is strongest when we first sense it, after that the sense declines in strength.
  5. abosolute threshold
    the lowest level of a stimulus that we can detect 50% of the time
  6. Just noticible difference( JND)
    the smallest change we can sense stimulus intensity
  7. Signal to noise ratio
    sometimes the stimulus is unclear so our brain makes its best guess.
  8. Perceptual constancy
    the process by which we perceive stimuli consistently across varing condition (shape constancy/ color constancy)
  9. Iris
    colored area containing muscles that control the pupil
  10. cornea
    curved, transparent dome that bends the incomming light
  11. Pupil
    opening in the center of the Iris that lets light in
  12. Lens
    Transparent disk that focuses light rays for near/ far distances
  13. Retina
    Membrane on the back of the eye containing recpetors
  14. fovea
    area on the retina where light is focused
  15. optic nerve
    Transmits visual signals to the rest of the brain
  16. Myopia
    Nearsighted: light focuses too soon
  17. Hyperopia
    farsighted: light focus too late
  18. Photorecptors
    visual sensory receptors. located in the retina
  19. cones
    sense bright light, concentrated in the fovea, concentraed in the peripheral
  20. rods
    sense dim light
  21. ganglia cells
    • carry visual information from the eye to the brain
    • forms the optic nerve
  22. subtractive color mixing
    mixing of pigments which in turn absorb more lights and gets darker (painting)
  23. additive color mixing
    mixing of colored light which in turn gets brighter (light)
  24. trichromatic theory of color vision
    idea that color vision is based on three primary colors- blue, green, and red
  25. opponent process theory of color vision
    idea that we perceive things as red or green, blue or yellow, light or dar, so these color must inhibit each other.
Card Set
sensation and perception