Chapter 3&4 Summaries

Chapter 3&4 Summaries - Chapter 3 Summary 1. People...

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Chapter 3 Summary 1. People with nonfunctional sense often compensate by relying on their other senses to fill in the missing information. (p. 84) 2. Sensation is the process of detecting a physical stimulus, such as light, sound, heat, or pressure. (p. 85) 3. Perception is the process of integrating, organizing, and interpreting sensations. (p.85) 4. There is no clear line as to where sensation leaves off and perception begins. (p.85) 5. Sensory receptors convert different forms of physical energy into electrical impulses that are transmitted by neurons in the brain. This process is referred to as transduction. (p.85) 6. The point at which a stimulus is strong enough to be detected by a sensory receptor is called a threshold. There are two types of sensory thresholds. (p.86) 7. The absolute threshold refers to the smallest possible strength of a stimulus that can be detected half the time. (p. 86) 8. The difference threshold is the smallest possible difference between two stimuli that can be detected half the time. (p. 86) 9. Weber’s Law explains that detection of a change in the strength of a stimulus depends on the intensity of the original stimulus. (p. 86,87) 10. Sensory adaptation refers to the gradual decrease in sensitivity to a constant stimulus, such as sitting on the sofa. (p. 88) 11. The difference between each of the electromagnetic energies is distance between its peaks, or wavelength, as it travels through space. (p. 88) 12. What we see is light that is reflected from objects that enter our eyes that passes through the corneas, pupils, and lenses before it is transmitted by the brain. (p. 89) 13. In a process called accommodation, light that enters through the lenses of our eyes is bent or focused so that it falls on the retinas. (p. 89) 14. The retina is a thin, light-sensitive membrane that lies at the back of the eye. (p. 90) 15. The point at which the optic fibers that make up the optic nerve leave the back of the eye and project to the brain is called the optic disk. (p. 91) 16. The optic disk has no photoreceptors, which causes a blind spot to occur in our field of vision. (p. 91) 17. The optic nerve is the thick nerve that exits from the back of the eye and carries visual information to the visual cortex in the brain. (p. 92) 18. There are several distinct neural pathways in the visual system that are each responsible for handling a different aspect of vision. (p. 93) 19. The perceptual experience of different wavelengths of light, involving hue, saturation, and brightness is called color. (p. 94) 20. A person with normal vision can discriminate from 120 to 150 color differences based on differences in hue. (p. 94) 21. The color of an object depends on the wavelength of light that reflects off the object. (p. 94)
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This note was uploaded on 04/01/2011 for the course PSY 101 taught by Professor Staff during the Winter '10 term at Saginaw Valley.

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Chapter 3&4 Summaries - Chapter 3 Summary 1. People...

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