Cogsci 1 Final Exam Updated Actual Questions And Correct Answers

COGSCI 1 FINAL EXAM UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
Question:
1. Ungerleider and Mishkin
Answer:
xperimented on monkeys different parts of brain removed

Question:
2. two pathways of visual processing
Answer:
dosal stream & ventral stream

Question:
3. Dorsal Stream
Answer:
where pathway regions off visual cortex involved in perception of spatial location begin = striate
cortex end = posterior cortex

Question:
4. Ventral Stream
Answer:
what pathway regions off visual cortex involved in perception of form begin = striate cortex end =
inferior temporal cortex

Question:
5. Marr's tri-level hypothesis
Answer:
Understanding how cogntive processes are implemented in the brain holds mental or artifical infro
processing events

Question:
6. Marr's Computational Level
Answer:
1) Highest, most abstract
what does the problem entail? output? purpose or reason of process

Question:
7. Aim for visual processing
Answer:
Object recognition

Question:
8. Marr's Algorithmic level
Answer:
2) Programming Info processing steps: formal procudure, steps and order

,Question:
9. Marr's Implementation level
Answer:
3) Lowest level
where is it being used phyiscally human or computer

Question:
10. Marr's model of visual processing
Answer:
system takes complex patterns of unstructured stimuli into representations object recognition

Question:
11. Marr's model of visual processing STAGE 1
Answer:
Image projected onto the retina & analyzed based on intensity of light and dark areas Adjacent regions
of light and dark contract = edges & contour of basic features of an object Result = RAW PRIMAL
SKETCH

Question:
12. Marr's model of visual processing STAGE 2
Answer:
RAW PRIMAL SKETCH -> group of objects simlar in size & orientation features -> representation of
objects in 2.5D Problem: object constancy of image in retina

Question:
13. Marr's model of visual processing STAGE 3
Answer:
3D sketch of axes, symetry and elongation : Object parts

Question:
14. Marr's stage 3: Symmetry Axis
Answer:
Lines that divides object into mirrored halves

Question:
15. Marr's stage 3: Elongation Axis
Answer:
line defining direction of bulk/mass of shape

Question:
16. Human Visual System
Answer:
First, input from retina is conveyed to optic nerve through optic chiasm to superior colliculus in
brainstem Then to LGN (Lateral geniculate nuclues) of thalamus

Question:
17. Location of LGN

, Answer:
Thalamus

Question:
18. LGN projects to
Answer:
AREA V1 (Primary visual cortex) maps to (striate cortex)

Question:
19. Area V1
Answer:
info process begins Retinotopically organized
- neighboring regions in visual field are represented by regions of V1

Question:
20. Feature detectors
Answer:
neurons in V1 sensitive to low-level features filter out to create edges & contours

Question:
21. V1 projects to
Answer:
V2

Question:
22. V2
Answer:
Process complex features of edges, shape, depth

Question:
23. Retinal Disparity
Answer:
Points in objects at different distances will be in different locations of two retinas
- you see different things if you close one side of the eye (L or R)

Question:
24. Extratriate cortex
Answer:
Region surrounding striate depth perception features: movement, spatial frequency, disparity and color

Question:
25. Tri-chromatic theory
Answer:
retina has 3 different receptors (cones) RED, GREEN, BLUE

Question:
26. Opponent process theory