Class Notes (1,200,000)
CA (650,000)
UW (20,000)
PSYCH (2,000)
PSYCH101 (800)
Lecture

October 5th Lecture Notes highly deatailed notes about the eye and its functions.


Department
Psychology
Course Code
PSYCH101
Professor
Colin Mac Leod

This preview shows half of the first page. to view the full 2 pages of the document.
PSYCH 101
October 5th 2010
Retinal Receptors
-> Rods: retinal receptors that detect shading of black, white & grey. 125 milli
on; many to one
-> Cones: retinal receptors that detect colours; concentrated in the fovea (cent
re). 6 million ; one to one.
Eye Movements
Saccade: movement of the eye (
jump
); takes about ¼ second (250ms); blind
Fixation: stabilized eye once stopped; lasts about ¼ second; processing visually
Processing light:
->see light from 380-760 nanometers (violet to red)
->can detect 3 aspects of light;
-hue (colour)
-intensity (brightness)
-saturation (purity; saturated = 1 colour)
Processing Colour:
-> Trichromat theory : types of cones detect 3 different wavelengths. (normal co
lour vision)
->opponent process theory; 2 types of ganglion cells encode colour
-red/green and yellow/blue
-fast firing = red or yellow .
->colour blindness; 5% of males; usually red/green
- protanopia: lack of photo pigments for red cones; green instead; read
appears to be darker (less intense)
-deuteranopia: lack of photo pigments for green cones; red instead; gree
n darker
-tritanopia; 1 in 10,000 (not sex linked); loss of blue cones; see in re
ds and greens
Visual Perception
The Gestalt Psychologists
- Kurt Koffka
- Wolfgang Kohler
- Max Wertheimer
its not what you saw its what you think about what you see
Thought they could set up a set of laws on how we see the laws
1) Gestalt Grouping
- proximity; elements closest to each other belong to the same figure
- similarity; elements similar to each other belong to the same figure
- closure; elements
missing
form the figure are seen as part of the figure
and filled in
-good continuation; when multiple interpretations of elements exist the
simplest will be preferred
Pattern Recognition
-> templates: patterns used to perceive objects or shapes via a process of compa
rison
->prototypes: idealized patterns used to perceive objects or shapes y a process
of comparison
->distinctive features: critical characteristics for distinguishing an object fr
om other objects (either as images or as lists)
You're Reading a Preview

Unlock to view full version