perception questions

if YOU were in my psychology of perception class this term, you would have to know the answers to the following questions. do you?

1. short answer, use a graph to illustrate if you want: how come sometimes you can't tell whether a stimulus on your skin is very hot or very cold?

2. short answer: using the following figure (click here for the figure), explain why the loudness button on your stereo is useful, and under what listening conditions you would most likely want to use it. (note: the loudness button, when pressed, boosts the volume of the low frequencies).

3. true or false, if false explain why: below the detection threshold, people never detect the stimulus; above the detection threshold people always detect the stimulus.

4. true or false, if false explain why: the case of the missing fundamental is evidence for the place code.

5. match the anatomical structures on the left with their functions on the right. note that not all functions will be used.
   

   pinna	releases pressure built up in the inner ear
   umami	senses stretching of skin
   cilia	controls the amount of light let into the eye
   lens	sodium receptor
   Pacinian corpuscle	senses fluttering on the skin
   iris	glutamate receptor
   oval window	sound localization
   	focusing
   	controls the movement of the lens
   	sound transduction
   	receives vibrations from the stapes

6. in millimeters, how much of V1 cortex does a quarter 1 meter away subtend (a) if the quarter is viewed in the fovea? (b) if the quarter is viewed 25 degrees eccentric?

7. true or false, if false explain why: the McGurk effect shows that speech perception relies on both auditory and visual information.

8. multiple choice, choose all that apply: categorical perception...
   (a) ... shows that listeners can discriminate small differences in voice onset time (VOT).
   (b) ... explains the McGurk effect.
   (c) ... is constant across languages.
   (d) ... explains how phonemes in different coarticulatory environments can be perceived as the same.
   (e) ... is the reason why we can tell /ba/ from /pa/.
   (f) ... is the reason why we can tell /ba/ from /ga/.