PSYC10003 Lecture Notes - Lecture 14: Afterimage
13 Jun 2018
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29th March ‘18
MBB1 Week 5; Lecture 14 Notes
Colour 2
-reality? what is it?
-we see all visible colours & lights from all 3 photopigments
-internal world is maximally fragmented (atomic) @ photoreceptor level of processing
-deduced simple by examination, introspection & deduction
-relatively simple observation = revealing great detail about underlying system
-power of observation
-2 stages of vision deduced on basis of phenomenology
-“not 3 main colours, 4”
-“opponent-colour theory” = there’s an opponent afterimage (negative of the colour) if you
look at a colour long enough
-brain adapts to sudden loss of colour
-sensation = not wavelength detection
-brain is sensitive to change, we need balance
-opponency
-excitation (neurones) & sensation (system)
-Hering - subjective experience of colour (sensation)
-opponency: general strategy for system where 2 stimulus properties are in balance with each
other
-fundamental for both excitation and sensation
-colours and context
-two colours can look completely different bc of it’s surroundings (different contexts), such as
shadows, darker light
find more resources at oneclass.com
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Document Summary
We see all visible colours & lights from all 3 photopigments. Internal world is maximally fragmented (atomic) @ photoreceptor level of processing. Deduced simple by examination, introspection & deduction. Relatively simple observation = revealing great detail about underlying system. 2 stages of vision deduced on basis of phenomenology. Opponent-colour theory = there"s an opponent afterimage (negative of the colour) if you look at a colour long enough. Brain adapts to sudden loss of colour. Brain is sensitive to change, we need balance. Hering - subjective experience of colour (sensation) Opponency: general strategy for system where 2 stimulus properties are in balance with each other.
