1. Other Senses
Smell
Taste
Touch

2. Touch Receptors located in our skin.
Gate Control Theory of Pain
Gate Control brain has ability to shut off gate that controls whether pain shoots up spinal cord or not.

3. Reducer-Augmenter Scale

4. Spider test
Poke your arm (lightly!) with a pencil or pen from the crease of your arm to your palm. What happens to your sensation? Why?

5. Taste We have bumps on our tongue called papillae.
Taste buds are located on the papillae (they are actually all over the mouth).
Sweet, salty, sour and bitter.

6. Smell and Taste
Smell and taste are referred to as the chemical senses because their receptors are sensitive to chemical molecules.
In order to smell, the appropriate gaseous molecules must come into contact with the smell receptors in your nose.
These receptors send messages about smells through the olfactory nerve to the brain.
Section 2

7. Smell and Taste (cont.)
Olfactory nerve—the nerve that carries smell impulses from the nose to the brain.
In order to taste, appropriate liquid chemicals must stimulate receptors in the taste buds on your tongue.
Section 2

8. Vestibular Sense Tells us where our body is oriented in space.
Our sense of balance.
Located in our semicircular canals in our ears.

9. Kinesthetic Sense Tells us where our body parts are.
Receptors located in our muscles and joints.

10. Sensation & Perception
5/19/2019
Measuring Senses
Absolute threshold.
Signal-detection theory.
©1999 Prentice Hall
©1999 Prentice Hall

11. Signal-Detection Theory
Sensation & Perception
5/19/2019
Signal-Detection Theory
A psychophysical theory that divides the detection of a sensory signal into a sensory process and a decision process.
Stimulus is
Present
Absent
Response: “Present”
Hit
False Alarm
Response: “Absent”
Miss
Correct Rejection
©1999 Prentice Hall
©1999 Prentice Hall

12. SDT: Now You Try… Hit False Alarm Miss Correct Rejection
Is that car up ahead on the road way a police car?
Should a student be accepted into a graduate program?
Stimulus is
Present
Absent
Response: “Present”
Hit
False Alarm
Response: “Absent”
Miss
Correct Rejection