Form Perception 1 - Form Perception 1: Module 1:...

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Form Perception 1: Module 1: Introduction to Form Perception: When looking at a vase of flowers against a flowery background the mind has to do a lot to figure out what it is looking at What is the background? What is the rest? What is the vase? What is the flower? What parts go with the flower? What parts go with the wallpaper? All this while remembering that this is only one view of the scene Despite having to think all of this, you could see a picture in one second and know what it is Distinguishing all this information is form perception Module 2: Gestalt Principles: 1920’s and 30’s, German psychologists Believed that the whole is greater than the sum of its parts, i.e. we look at things as a whole, not in parts This was in reaction to a structuralist approach where everything is broken down into parts Eg. Consider the perception of motion when watching a movie made up of flashing static images There isn’t continuous motion in or across any of these frames but we still perceive motion Motion is an emergent property of the sequence of pictures The perception of the movie in its entirety is something more than a thousand still pictures The psychologists also suggested laws of organization that described how we group visual input Gestalt Principles: laws of organization, innate or rapidly acquired 1) Figure ground: ability to determine in a scene, what is the object and what is the background Simple snowman example, white snowman on black background The snowman is perceived as the object because it has a perceptible form because it has distinct edges Backgrounds are either formless, or have multiple forms Simple process, can be made more difficult if the cues that are used to make these figure- ground decisions aren’t clear 2) Proximity: elements that are close together in space tend to belong together Eg. Daisies in the field, the daisies that are close together will be seen as a group, you won’t take daisies from all over the field and group them 3) Closure: if there are gaps in the contours of shapes we tend to fill in those gaps and perceive a whole object Eg. A truck hit a telephone pole, we don’t perceive the truck as two separate pieces
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This note was uploaded on 04/17/2009 for the course PSYCHOLOGY 1XX3 taught by Professor Kim during the Spring '09 term at McMaster University.

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Form Perception 1 - Form Perception 1: Module 1:...

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