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Lecture 16

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Carolyn Ensley

Lecture 16Chapter 11 Visual KnowledgeLecture OutlineLongTerm Visual MemoryThe Diversity of KnowledgeLongTerm Visual MemorySo far we have discussed images that have been recently seen and are held in working memoryWhat is the nature of visual imagery taken from longterm memoryLongTerm Visual MemoryImages seem to be stored in longterm memory in a piecemeal fashionLink the different details together as you rememberWhen you imagine these different areas of an image they appear To form a mental image you must activate a representation of an image frame and then elaborate on this frame to make the image more detailedIn agreement with this hypothesis images that have more parts or detail take more time to createLongTerm Visual MemoryFor example a mental image of four columns of dots takes more time to generate and is more difficult to maintain than a mental image of three rows of dotsLongTerm Visual MemoryInformation stored in longterm visual memory is sometimes thought of in terms of image files which specify what particular objects or shapes look likeImage files are used as recipes or instructions for how to construct an active mental image of the object or shapeLongTerm Visual MemoryImage files may represent visual information in terms of propositions or verbal labelsThis may explain for instance why speakers of languages with a large number of color categories have better memories for colorthe memories may be the verbal labels and not perceptual representations of colorLongTerm Visual MemoryLongTerm Visual MemoryOther evidence that longterm visual memory may be propositional comes from studies showing that verbal labels influence later recreations of a studied figureLongTerm Visual MemoryErrors of reasoning about geography also suggest that this spatial information is remembered in terms of propositionsWhich is farther north Seattle or MontralLongTerm Visual MemoryIt is also clear that in most cases imagery helps memoryFor instance words that evoke imagery are easier to remember than those that do notFurther when learning pairs of words a useful mnemonic is to imagine the two concepts interacting
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