Psychology 2115A/B Chapter 3: Chapter 3

• School: Western University
• Department: Psychology
• Course: Psychology 2115A/B
• Professor: Dr.Mark Holden

Document Summary

Outline: bottom-up perception, neural processing of visual signals, do feature detectors play a role in perception, sensory coding (neural representation) Bottom-up perception: bottom-up perception: basic sensory elements are combined and combinations are combined to eventually p(cid:396)odu(cid:272)e a pe(cid:396)(cid:272)eptio(cid:374) of the (cid:862)(cid:449)hole(cid:863, e. g. Complex feature detectors: neurons in temporal lobe increase firing rates when we see certain objects with multiple features e. g. squares vs rectangles vs circles. In another area of temporal lobe some neurons respond specifically to pictures of faces. In all three cases: a gets same amount: stimulate a only high rate of firing in a, stimulate a+b medium rate of firing in a, stimulate a+ bright b low rate of firing in a. Lateral inhibition: inhibition transmitted horizontally across retina: lateral plexus sends lateral signals in horseshoes, horizontal cells and amacrine cells in humans (go along retina instead of through) Initially, the response of bipolars are the same, but then they differ based on lateral inhibition.