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Psychology (9,697)
PSYB57H3 (366)
George Cree (102)
Chapter 11

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George Cree

Chapter 11Visual Knowledge 339Visual Imagery Introspections about ImagesMental images studied by psychologists to show systematic data about imageryFrancis Galton asked people to describe their images and rate them for vividnessIntrospectlook withinand report their own mental contentsSelfreport data fit well with common sense Participants reported that they could inspect their images as much as they would inspect a picture could read off from image details of colour and textureMode of representation that is picturelikeParticipants differed widely from each other ie some were rich in detail while others were very sketchyDo individuals differ in the nature of mental imageryChronometric Studies of ImageryImagery researchers have been interestedw what people do with their imagesread information off them or manipulate them in some way examine how accurate or how fast people are in their responses and w appropriate comparisons to measure as basis for testing hypothesesChronometrictime measure studies give more accurate portrait of mental imagery ie let people know what information are used in mental image and what sorts are not and see how picturelike mental images areie writing a paragraph of a cat and not including facts that cats have heads etcPattern of what information is included and what info is prominent depends on the mode of presentation ie description vs depiction Study w Kosslyn 1976participants were asked to form a series of mental images and answer yesno questions about each They were asked to form a mental image of cat and asked Does the cat have a head Does the cat have claws Participants asked quickly and responses to head question were quicker than those to claws question Information quickly available in the image follows the rules for pictures not paragraph Another group were asked to think about cats asked same question but gave quicker responses to clawsreverse patternMODE OF REPRESENTATION CHANGES AND SO DOES THE PATTERN OF INFORMATION AVAILABLITY Another example memorize locations of various landmarks well straw hat etc Made participants have map memorized by asking them to draw a replica of the map form memory then main experiment FINISH SOMEHOWWhen scanning across a mental image there is a clear relationship bw travel time and travel distancetravelling a greater distance requires more timeMental RotationTransformation of mental imagesExperiments w Shepard Cooper and Metzler Participants asked to decide whether 2 different shapes or 1 from 2 different perspectives Is it possible to rotate the form so that is will end up looking just like the form on the right
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