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Sensation and Perception

Sensation and Perception

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Sensation and Perception

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Presentation Transcript

  1. Sensation and Perception Chapter 4

  2. Sensation & Perception The Basics

  3. What Are They? Sensation Perception Psychological process in how we interpret sensory stimulation Reflects learning, expectations & attitudes • Stimulation of sensory receptors and sending of sensory info to brain • Automatic

  4. Absolute Threshold • Weakest amount of stimulus that can be sensed • Differs from person to person

  5. Difference Threshold • The minimum amount of difference detected between two stimuli • Varies from person to person

  6. Signal-Detection Theory • Distinguishing sensory stimuli that takes into account strengths, as well as setting, mood, attitude, motivations, etc…. • High school vs. college

  7. Sensory Adaptation • Process of becoming more sensitive to weak stimuli and less sensitive to unchanging stimuli • City noise, waves at beach

  8. Vision Featuring Your EYEBALLS

  9. Let there be….LIGHT • Electromagnetic energy • Comes in wavelengths • Main colors of spectrum- from longest to shortest wavelengths • ROY G. BIV

  10. AHH…..MY EYE!! • http://www.biologymad.com/resources/eye.swf

  11. The Blind Spot • Place in your eye that doesn’t have photoreceptors

  12. Rods Vs. Cones • Rods are sensitive to brightness of light • Cones provide color vision

  13. Dark and Light Adaptation • Adaption to bright light happens more quickly that adaptation to dark

  14. Visual Acuity • The ability to see visual details in normal light • Nearsighted • farsighted

  15. Color Vision

  16. Cones and Color Vision • Blue, green & red cones, when all stimulated…color! • Images are made of many tiny dots of color, called pixels

  17. After Images

  18. Color Blindness • Absence or malfunction of the cones • Red-green color blind is common • Totally color blind less common

  19. Hearing Featuring YOUR EARS

  20. How does it work ? • SOUND WAVES

  21. Pitch • How high or low a sound is

  22. Loudness • Sound measured by dB • Zero dB is threshold of hearing

  23. Locating Sounds • Yes.

  24. Deafness • Conductive Deafness • Occurs from damage to middle ear • Sensorineural • Damage to inner ear