PSYC 101 Chapter 3 PowerPoints

PSYC 101 Chapter 3 PowerPoints - Sensation and Perception...

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Sensation and Perception Chapter 3
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Chapter 3 Learning Objective Menu LO 3.1 Sensation and how it enters central nervous system LO 3.2 What is Light LO 3.3 How eyes see and how eyes see color LO 3.4 What is sound LO 3.5 Hearing impairment and improvement LO 3.6 How senses of taste and smell work LO 3.7 Sense of touch, pain, motion and balance LO 3.8 Perception and perceptual constancies LO 3.9 Gestalt principles of perception LO 3.10 How the world is perceived in three dimensions LO 3.11 How visual illusions work and other factors influence perception
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Sensation Sensation - the activation of receptors in the various sense organs. Sensory receptors - specialized forms of neurons. Sense organs: eyes ears nose skin taste buds LO 3.1 Sensation and the central nervous system Menu
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Menu LO 3.1 Sensation and the central nervous system
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Sensory Thresholds Just noticeable difference (jnd or the difference threshold) - the smallest difference between two stimuli that is detectable 50 percent of the time. Absolute threshold - the smallest amount of energy needed for a person to consciously detect a stimulus 50 percent of the time it is present. LO 3.1 Sensation and the central nervous system Menu
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Subliminal Sensation Subliminal stimuli - stimuli that are below the level of conscious awareness. Just strong enough to activate the sensory receptors but not strong enough for people to be consciously aware of them. Limin - “threshold” Sublimin - “below the threshold.” Subliminal perception – process by why subliminal stimuli act upon the unconscious mind, influencing behavior. LO 3.1 Sensation and the central nervous system Menu
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Habituation and Sensory Adaptation Habituation - tendency of the brain to stop attending to constant, unchanging information. Sensory adaptation - tendency of sensory receptor cells to become less responsive to a stimulus that is unchanging. Microsaccades - constant movement of the eyes, tiny little vibrations called that people do not notice consciously; prevents sensory adaptation to visual stimuli. LO 3.1 Sensation and the central nervous system Menu
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Brightness - determined by the amplitude of the wave—how high or how low the wave actually is. The higher the wave, the brighter the light will be. Low waves are dimmer. Color - or hue, is determined by the length of the wave. Long wavelengths are found at the red end of the visible spectrum (the portion of the whole spectrum of light that is visible to the human eye), whereas shorter wavelengths are found at the blue end. Saturation - refers to the purity of the color people see; mixing in black or gray would also lessen the saturation. LO 3.2
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This note was uploaded on 03/03/2010 for the course PSYCH 101 taught by Professor Nahad during the Spring '07 term at Ivy Tech Community College.

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PSYC 101 Chapter 3 PowerPoints - Sensation and Perception...

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