Chapter 4: Sensation and Perception

Chapter 4: Sensation and Perception

1. Sensation

   • Information from our 5 senses. 
   • Visual System
     • Lens
       • Focuses light on retina
     • Pupil
       • regulates amount of light
     • Retina
       • sense organ for light
       • Rods
         • black and white
       • Cones
         • Color vision
     • Brightness
     • Color
     • Saturation
   • Auditory system
     • Vestibular system
     • Semi-circular canals
     • Loudness
     • Pitch
     • Timbre
   • Psycho Physics
     • Sensation begins with a detectable stimulus 
     • Thresholds
       • The threshold is the minimum amount of change required to generate an action potential. 
       • Fechner
       • Absolute Threshold
         • In neuroscience and psychophysics, an absolute threshold was originally defined as the lowest level of a stimulus —light, sound, touch, etc.—that an organism could detect.
     • JND
       • Just Noticeable Difference (JND) is a sensory environment for one person at a time lying in total darkness. The installation is based on Gustav Fechner's concept of the just noticeable difference: the ability to perceptually detect the smallest changes in sensory stimuli.
       • Weber
   • Taste
     • Sweet
     • Sour
     • Bitter
     • Salty
     • Umami
   • Smell
     • Olfactory
     • Pheromones
   • Touch
     • Pressure
     • Pain
     • temperature
     • Kinesthetic

2. Perception

   • Making sense of what we perceive. 
   • Feature Analysis
     • Bottom-Up
       • Believe what we see
     • Top-Down
       • See what we believe
     • Ames Room
     • Gestalt Form Perception
   • Perception of Vision
     • Trichromatic
       • Eye has three types of receptors pairings of the same three colors: green, blue, and red. 
     • Operant process
       • receptors act opposite Green, blue, and red. 
     • Optical illusion
     • Occipital Lobe

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