Chapter 4 Sensation and Perception

1. Chapter 4Sensation and Perception How does the world out there get in?

2. Describe a situation where… • you experienced difficulty as a result of failing to hear, see, taste, smell, or feel something around you. • you sensed something in the environment but were unable to accurately interpret the info.

3. sensation • stimulation of sensory receptors and transmission of sensory information to the central nervous system (CNS) • occurs when a stimulus activates a receptor • automatic

4. perception • process through which we interpret sensory stimulation • reflects learning, expectations, attitudes • organization of sensory information into meaningful experiences

6. Aoccdrnig to rscheearch at Cmabrigde Uinervtisy, it deosn't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoetnt tihng is taht the frist and lsat ltteer be at the rghit pclae. The rset can be a total mses and you can sitll raed it wouthit a porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe.

7. absolute threshold • weakest amount of stimulus required to produce a sensation • (needed to block out extraneous stuff)

8. difference threshold • minimum amount of difference a person can detect between 2 stimuli

9. signal-detection theory • recognizing stimulus against background of competing stimuli

11. Red BlueYellowGreen OrangeBlueRed Yellow GreenOrangeBlueRed Red GreenBlueOrange

12. sensory adaptation • process by which we become more sensitive to weak stimuli and less sensitive to unchanging stimuli

13. Demonstrations for 4-2 (The Eye)

14. “Seeing is believing.”

20. Chapter 4, Section 5 Perception

21. Closure

22. object = figure surrounding = ground

24. Proximity

25. A Review of the Gestalt Rules of Perceptual Organization • What were the five rules? • proximity, similarity, continuity, connectedness, closure

26. Stroboscopic Motion

27. Texture Gradient

28. Color Constancy