Chapter 4: Sensation and Perception Lecture 6 7

1. Chapter 4: Sensation and PerceptionLecture 6 & 7

2. Learning Outcomes Define and differentiate between sensation and perception. Identify the parts of the eye, describe the properties of light and the theories of color vision.

3. Learning Outcomes Describe how visual perception is organized. Identify the parts of the ear; explain the sense of hearing.

4. Learning Outcomes Describe the chemical senses. Identify the skin senses and theoretical explanations for pain.

5. Learning Outcomes Describe the kinesthetic and vestibular senses. Explain why psychologists are skeptical about extra sensory perception.

6. Sensation and Perception

7. What are Sensation and Perception? �I have perfect vision� �Heather Sellers has problem with her perception. She cannot recognize faces-prosopagnosia (face blindness) �In college, on a date at the Spaghetti Station, I returned from the bathroom and plunked myself down in the wrong booth, facing the wrong man. I remained unaware he was not my date even as my date (a stranger to me) accosted Wrong Booth Guy, and then stormed out of the Station. I can�t distinguish actors in movies and on TV. I do not recognize myself in photos or video. I can�t recognize my stepsons in the soccer pick-up line; I failed to determine which husband was mine at a party, in the mall, at the market� This curious mix of �perfect� vision and face blindness illustrates the distinction between sensation and perception. Truth or Fiction? People have five senses. FALSE People have many more than five senses. Touch is just one of your �skin senses� which also include pressure, warmth, cold, and pain. There are also senses that alert you to your own body position without your having to watch every step you take.Truth or Fiction? People have five senses. FALSE People have many more than five senses. Touch is just one of your �skin senses� which also include pressure, warmth, cold, and pain. There are also senses that alert you to your own body position without your having to watch every step you take.

8. 1. What are Sensation and Perception? Her Sensation-the stimulation of sensory receptors and transmission of sensory information to the central nervous system, is normal. Her Perception- the process by which sensations are organized and interpreted to form an inner representation of the world, is almost normal. She recognizes people from their hair, etc., but not face

9. 2. Absolute Threshold Weakest amount of a stimulus that can be distinguished from no stimulus at all Detected 50% of the time Truth or Fiction? If we could see waves of light with slightly longer wavelengths, warm-blooded animals would glow in the dark. TRUE If you could see light with slightly longer wavelengths, you would see infrared light waves. Since heat generates infrared light, warm-blooded people, including other people would glow in the dark. Vision � a candle flame viewed from about 30 miles on a clear night Hearing � a watch ticking from about 20 feet away in a quiet room Taste � 1 teaspoon of sugar dissolved in 2 gallons of water Smell � about one drop of perfume diffused though a small house Touch � the pressure of the wing of a fly falling on a check about a distance of about .4 inch Truth or Fiction? If we could see waves of light with slightly longer wavelengths, warm-blooded animals would glow in the dark. TRUE If you could see light with slightly longer wavelengths, you would see infrared light waves. Since heat generates infrared light, warm-blooded people, including other people would glow in the dark. Vision � a candle flame viewed from about 30 miles on a clear night Hearing � a watch ticking from about 20 feet away in a quiet room Taste � 1 teaspoon of sugar dissolved in 2 gallons of water Smell � about one drop of perfume diffused though a small house Touch � the pressure of the wing of a fly falling on a check about a distance of about .4 inch

10. 2. Absolute Threshold Weakest amount of a stimulus that can be distinguished from no stimulus at all Detected 50% of the time