Psychology Chapter 5

  1. Transduction
    The process of transforming physical energy into electrochemical energy.
  2. Sensation
    The process of receiving stimulus energies from the environment
  3. Perception
    The brains process of organizing and interpreting sensory information to give it meaning.
  4. Subliminal Perception
    The detection of information below the level of conscious awareness.
  5. Absolute threshold
    The minimum amount of stimulus energy that a person can detect.
  6. Difference threshold
    The smallest difference in stimulation required to discriminate one stimulus from another 50 percent of the time. (Aka: Just noticeable difference)
  7. Sensory adaptation
    A change in responsiveness of the sensory system based on the average level of surrounding stimulation
  8. Sensory receptors
    Specialized cells that detect stimulus information and transmit to sensory (afferent) nerves and the brain.
  9. hue
  10. wavelength
    Distance from the peak of one wave to the peak of the next
  11. Amplitude
    The height of the wave and is linked with the brightness of a visual stimulus
  12. Purity
    A mixture of wavelengths in light that is related to the perceived saturation or richness of a visual stimulus.
  13. Iris
    Colored part of the eye
  14. Cornea
    Clear membrane in front of the eye-bends light falling on the surface of the eye just enough to focus it at the back of the eye
  15. Lens
    Fine tunes focusing
  16. Retina
    Light sensitive surface that records what we see and converts it to neural impulses for processing in the brain (at the back of the eye)
  17. Fovea
    a minute area in the center of the retina at which visual information is at its best. Contains many cones
  18. Optic Nerve
    Axons of ganglion cells which carry the visual information to the brain for further processing
  19. Trichromatic Theory
    States that color perception is produced by three types of receptors (cones in the retina) that are particularly sensitive to different, but overlapping, ranges of wavelengths
  20. Dichromats
    people with only two kinds of cones
  21. Trichromats
    people with three types of cones and normal color vision
  22. Top Down Processing
    Start with some sense of what is happening and apply that framework to information from the world
  23. Bottom Up Processing
    Taking information from the environment and trying to make sense of it
  24. Depth Perception
    The ability to perceive objects three-dimensionally
  25. Gestalt Psychology
    School of psychology emphasizing that people naturally organize their perceptions according to certain patterns
  26. Middle Ear
    Anvil, stirrup, hammer, eardrum. They vibrate and transmit sound waves to the fluid-filled inner ear
  27. Pinna
    Outer, visible part of the ear. Collects sounds and channels them to the interior of the ear
  28. Gate Control Theory of Pain
    The brain can send signals downward to the spinal cord to close the gate and to suppress the sensation of pain
  29. Papillae
    Bumps on tongue that contain taste buds, receptors for taste
Card Set
Psychology Chapter 5
Test Chapters 5 and 6