Sensations and Stuff

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Author:
chanchan27104
ID:
239136
Filename:
Sensations and Stuff
Updated:
2013-10-06 21:41:23
Tags:
psychology
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psych
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  1. Sensation
    the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment
  2. Perception
    the process of 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 information
  4. Top-Down Processing
    information processing guided by higher-level mental processes, as when we construct perceptions drawing on our experience and expectations
  5. Psychophysics
    the study of relationships between the physical characteristics of stimuli, such as their intensity, and our psychological experiences of them
  6. Absolute Thresholds
    the minimum stimulation needed to detect a particular stimulus 50% of the time
  7. Signal Detection Theory
    • a theory predicting how and when we detect the prescence of a faint stimulus (signal) amid background stimulation (noise)
    • Assumes that there is no single absolute threshold and that detection depends partly on a person's experience, expectations, motivation, and level of fatigue
  8. Subliminal
    below one's absolute threshold for conscious awareness
  9. Priming
    the activation, often unconsciously, of certain associations, thus predisposing one's perception, memory, or response
  10. Difference Threshold
    the minimum difference between two stimuli required for detection 50% of the time
  11. Weber's Law
    the principle that to be perceived as different, two stimuli must dier by a constant minimum percentage (rather than a constant amount)
  12. Sensory Adaptation
    diminished sensitivity as a consequence of constant stimulation

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