PSY 2104 Lecture 4: Chapter 4 Perceiving and Recognizing Objects and Color

• School: Temple University
• Department: Psychology
• Course: PSY 2104
• Professor: Professor Smith

Document Summary

Outline: object processing in the visual system, gestalt psychology and object recognition models, moving beyond objects. Divide and conquer: dorsal stream processes where, how information. Fast but colorblind: ventral stream processes what information, broad generalization: cross connections, feedback as well as feedforward. Perception and action: when perception ( which is bigger? ) and action (grasp accuracy) are measured separately, only a perceptual bias is evident, this suggests that the visual illusions are affected the ventral as opposed to dorsal stream. Associative agnosia: patients with agnosia (without knowing) are unable to recognize objects, agnostic patients can often make very detailed copies of pictures that they cannot recognize, demonstrates low level vision is intact, lesion (injury) typically to ventral stream. Inference from associations is weak: maybe neighboring brain regions, maybe common cause. Ventral stream: ventral stream (what, parahippocampal place area (ppa): scenery, locations, fusiform face area (ffa): faces, extrasiate body area (eba): bodies.