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Canada (161,886)
Psychology (9,695)
PSYB57H3 (366)
George Cree (102)
Chapter 3

Chapter 3 - Recognizing Objects

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George Cree

B57 Chapter 3Recognizing Objects Visual Perception y Vision is the dominant sense o If visual info conflicts w info received from other senses we usually place our trust in vision y Form perception the process through which one sees what the basic shape size and position of an object are y Object recognition the steps or processes through which we identify the objects we encounter in the world around usWhy is Object Recognition Crucialy All knowledge and all use of knowledge depend on form perception and object recognition y Wo recognition you cannot bring your knowledge to bear on the world o Is also essential base for learning and memory y Object recognition is crucial for learning combine new info w info learned previously wo proper categorization there is no way to combine and integrate infoBeyond the Info Giventhy Early in the 20 c a group of psychologists called the gestalt psychologists noted that our perception of the visual world is organized in ways that the stimulus input is not thus they argued that the organization must be contributed by the perceiver this is why the perceptual whole is often different from the sum of its parts y Necker Cube This diagram is called an ambiguous figure bc there is more than one wayto perceive it y Your perception of the cube is not neutral instead you perceive the cube as having one configuration or the other your perception goes beyond the info given in the drawing specifying an arrangement in depth y The same point can be made for the ambiguous vaseprofiles figurethe drawing itself is neutral w regard to perceptual organization it is neutral w regard to figureground organization at this point your perception of the figure is not neutral it somehow specifies that you are looking at the vase and not at the profiles or that you are looking at the profiles and not the vase y figureground organization the processing step in which the perceiver determines which aspects of the stimulus belong to the central object and which aspects belong to the background Organization and Features y one might suppose we collect info about stimulus then we interpret this info deciding how the form is laid out in depth and what figure is groundthis view is WRONG y we do not just pick up the info in the stimulus the way a camera might record the light energies reaching it this is evident for ex in the phenomenon of lateral inhibition in which the visual system manages to emphasize some aspects of the input the edges and deemphasize others regions of uniform brightness from the very beginning y a number of observations suggest that our interpretation our organization of the input happens before we start cataloguing the inputs basic features and not after as secondary interpretive step o Ie at first we may not know what the image is but after a moment ppl will notice the hidden word LIFT thus ppl find a way to reorganize the figure so that the familiar letters come into view1
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