PSY 102 Chapter Notes -Optic Chiasm, Optic Nerve, Color Vision
22 Mar 2014
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Lpsy102: introduction to psychology (4) sensation and perception. Sensation the process of turning physical input (such as wavelengths of light) into the electro-chemical language of your nervous system. Perception the process of assigning meaning to that stimulation. First step in sensation is when external energy or substance gets converted into excitation or inhibition, called transduction. * the various lines, angles and shades of grey in this image provide you with many visual sensations. * these sensations do not differ when you see the rabbit from when you see the duck. Our brain is interpreting the sensations differently, creating different perspectives. Gustav fechner, published a landmark piece on perception. The field psychophysics evolved out of his work, how we perceive sensory stimuli based on their physical characteristics. Colour of light is called hue by psychologists. We"re sensitive to 3 colours, red green and blue. Mixing of these colours called additive colour mixing can create any colour.
