09 Lesson Sensation and Perception II

09 Lesson Sensation and Perception II - LESSON Sensation...

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Sensation and Perception II (Vision) ASSIGNMENT a. Study text Chapter 4 (pg 124-149) b. Complete Concept Checks 4.2 (pg 144) and 4.4 (pg 158). c. Review Questions: Chapter 4 practice test questions 4,5,9 (pg 171). d. Answer IPO 9 LESSON OBJECTIVES 9.1 Explain the process of sensation in the visual system 9.2 Explain factors that influence perception in the visual system PERFORMANCE OBJECTIVES 9-1 Explain visual sensory experience. a. Describe the properties of a visual stimulus (amplitude, wavelength and purity) and their psychological correlates (brightness, color and saturation). Amplitude : affects mainly the perception of brightness Wavelength : affects mainly the perception of color Purity : influences perception of the saturation, or richness, of colors ( saturation refers to the relative amount of whiteness in a color. The less whiteness, the more saturated it is.) b. Describe the functioning of the visual receptors: rods and cones. Rods: specialized visual receptors that play a key role in night vision and peripheral vision. They are more sensitive to dim light than cones Located on the periphery of the retina Cones: specialized visual receptors that play a key role in daylight vision and color vision Handle daylight vision because bright lights dazzle the rods Major role in perception of color Do not respond to dim lights so you can’t see color well in dim light Provide better visual acuity- sharpness and precise detail Concentrated heavily in the center of the eye The fovea is a tiny spot in the center of the eye that contains only cones; visual acuity is greatest at that point c. Describe the function of each component in the general visual pathway. (see CG. Fig 9-1 below on pg 64 in the course guide) 9 9 L E S S O N
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Transduction : Transduction is the process of converting one form of energy into another. As it relates to psychology, transduction refers to changing physical energy into electrical signals
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09 Lesson Sensation and Perception II - LESSON Sensation...

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