Study Questions: Recognition
1. Define "perception".
2. Briefly describe the gestalt principles of "grouping of
features". How would you demonstrate the relative importance of these
principles?
3. Describe the Gestalt principles of "good form". How are these
principles used to explain the perception of complex scenes containing
multiple objects?
4. Describe several things the Gestalt laws suggest that you
should do if you were interested in the problem of making ink drawings
with very effective camouflage of a given fixed portion of the drawing?
5. What are "ambiguous figures", "reversible figures" and
"impossible figures"?
6. What is an "illusory contour"? Draw an example.
Where in the brain does one begin to see responses to illusory as well
as real contours?
7. Describe a visual search experiment. How do the results turn
out for an easy search task as a function of the number of distractors?
How do the results change if the task is a difficult (serial) search
task? How do the reaction times for "no" answers differ from those for
"yes" answers? Why?
8. What is an "agnosia"? Describe different forms of
agnosias and their possible relationship to specific processing areas
in the brain for recognizing different categories of stimuli.
9. Briefly contrast viewpoint-dependent and viewpoint-independent
models of recognition. Is there any physiological evidence that relates
to this distinction?