Sensation and Perception

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Chapter 4 psych
brandy leblanc
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brandy leblanc
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Resumen del Recurso

Sensation and Perception
  1. Sensation is the stimulation of sense organs
    1. Perception is the selection, organization, and interpretation of sensory input. perception is Subjective.
      1. Psychophysics - The Study of how physical stimuli are transalted to psychological experience
    2. Absolute Thershold, a minimum amount of sensory stimulation that a organisim can detect 50% of the time
      1. Sensory Adaptions, is a gradual decline in sensitivity due to prolongued exposure. ex, you can no longer smell your perfume.
        1. Except sight due to Saccades - the eye is in constant motion, so our sight does not adapt.
      2. Bottom UP, a progression from individual to the whole
        1. Detect Specific features of stimulus
          1. Combine specific features into more complex forms
            1. Recognize stimulus
        2. Top DOWN, a progression from the whole to individual
          1. Formulate perceptual hypthesis about the nature of the stimulas as a whole
            1. examine feature to form a hypthesis
              1. Recognize the stimulas
          2. Webers Law: States that the size of a just noticable difference JND is a constant proportion of the size of the initial stimulas
            1. Gestalt Principles
              1. Proximity. Things that are close to one another look like they belong together
                1. Closure. Grouping elements to create a sense of closure
                  1. Similarity. Grouping stimuli that are similar
                    1. Simplicity. Organising elements in the simplist way possible
                      1. Continuity. seeing elements in ways that produce smooth continuation.
                      2. Transduction is the translation of a sensory stimuli to an electrical signal in the CNS, transduction is the essence of senstation.
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