PSL300H1 Final: PSL300 All Tweed_s Section
Document Summary
Introduction to the senses: sensory processing is inference. Senses evolved to guide behavior guide us away from danger, toward food & shelter: deduces what is going around us identify things. Sense data are incomplete and ambiguous brain has to infer. (cid:862)the (cid:271)rai(cid:374) is a ho(cid:373)i(cid:272)ide detective and the retinal image is the (cid:272)ri(cid:373)e s(cid:272)e(cid:374)e(cid:863) i. e. the brain guesses: sensory processing is unconscious inference. Identifying objects is easy for us can identify things after seeing their images for 100ms computation is unconscious: our senses process huge amounts of information. Brain has 100 billion neurons to process sensory activity designed for efficient handling of information. Depth: retinal images are 2-d, but the world is 3-d, so that means any retinal image is compatible with infinity of different 3-d objects. Assumption that faces are convex overrides the other assumptions i. e. our sensory systems have hierarchies of assumptions, stronger ones overriding weaker ones bayesian inference.
