Unit 4

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  1. Sensation?
    Sensory receptors and nervous system receive and represent stimulus energies from our environment
  2. Perception?
    Organizing and interpreting sensory information enabling us to recognize meaningful objects and events
  3. Bottom-up Processing?
    Analysis that begins with the sensory receptors and works up to the brain’s integration of sensory info
  4. Top-down Processing?
    Info processing guided by higher-level mental processes
  5. Selective attention?
    Focusing of conscious awareness on a particular stimulus
  6. Inattentional blindness?
    Failing to see visible objects when our attention is directed elsewhere
  7. Change blindness?
    Failing to notice changes in the environment
  8. Psychophysics?
    Study of relationships b/w physical characteristics of stimuli: intensity, psychological experience
  9. Absolute threshold?
    Minimum stimulation needed to detect a particular stimulus 50% of the time
  10. Signal detection theory?
    When we will detect weak signals, measured as our ration of “hits” to “false alarms”
  11. Subliminal priming difference threshold?
    Below one’s absolute threshold for conscious awareness, activation, often unconsciously, of certain associations, thus predisposing one’s perception, memory or response
  12. Weber’s Law?
    Principle that to be perceived as different, 2 stimuli must differ by a constant percentage (rather than a constant amount)
  13. Sensory adaptation?
    Diminished sensitivity as a consequence of constant stimulation
  14. Transduction?
    Conversion of one form of energy into another-transforming of stimulus energies: sight sound…etc into neural impulses
  15. Wavelength?
    Distance from one wave peak to the next
  16. Hue?
    Dimension of color that is determined by the wavelength of light
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Unit 4
2011-10-27 02:26:15
AP Psych

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