Class Notes (1,100,000)
CA (620,000)
U of G (30,000)
PSYC (4,000)
PSYC 2390 (200)
Lecture 13

PSYC 2390 Lecture Notes - Lecture 13: Monochromacy, Color Blindness, Tetrachromacy


Department
Psychology
Course Code
PSYC 2390
Professor
Lana Trick
Lecture
13

This preview shows page 1. to view the full 4 pages of the document.
March1st,2016
Lecture13:ColourVision(Continued)
Midtermhint:
shortessayquestions(Ithinkshesaidtherewouldbetwo),onewillbeaboutspatialfrequency.
Reviewfromlastclass
YoungHelmholtzTrichromaticColourTheory
● firsttorealizetherewere3differentkindsofcolourreceptors,for3differentcolours;red,
green,andblue
● redconeerythrolabe
○ respondsbesttolongwavelengthlight
● greenconechlorolabe
○ respondsbesttomediumwavelengthlight
● blueconecyanolabe
○ pickupshortwavelengthlight
● theideathatwedon’thaveaseparatecolourreceptorforEVERYcolourwesee,we
makeuseoftheoneswedohave(soyoudon’thaveareceptorforyellow,butyouuse
thefactthatyellowisbetweenred/greenonthespectrum,sohighred/greenactivitywith
lowblueactivitymakesyellow)
● thestudywith3projectorsofdifferentcolours,hadtousetomakeadifferentmetamers
○ sothey’dhaver/b/gprojectorsandhadtocombinethemtomakepurplefor
example
○ metamers:twothingsthatarephysicallydifferentbutweseethemasthesame
Colourdeficienciesandthecones(Today’slecture,pickingupfromlastweek)
● dichromats
○ peoplewhocan'tseeacertaincolour,colourblindness
○ wouldonlytaketwoprojectorstomatchanothercolour,soonlytakestwocolours
tomake
○ protanopes
■ missingtheredcone
○ deuteranopes
■ missingthegreencone
○ tritanopes
■ missingthebluecone
■ quiterare
○ ishiharacolourplates
○ abletostudydichromatesbecausetherearepeoplewhoarecolourblindinonly
oneeye
● monochromats
○ itonlytakesonecolourtomatchanyothercolour,reallyonlyseebrightness.
○ rodmonochromats
■ peoplewhohavenocones,havenomechanismforcolourvision
You're Reading a Preview

Unlock to view full version