Chapter 7 Review - MENTAL IMAGERY MATERIAL(Lecture 12 and...

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MENTAL IMAGERY MATERIAL (Lecture 12) and Ch 7 of Matlin text NAMES: 1. Zenon Pylshyn : Propositional Code 2. Roger Shepard : Analog Code. Also did mental imagery for shapes 3. Stephen Kosslyn : Supports Analog Code. Conducted FMRI studies which showed fMRI activity overlaps considerably when we look at images and when we imagine them. His study suggests the brain is really using “Analog Code”; “Imagine a rabbit and an elephant. Does the rabbit have eyelashes??” Doing that, takes time to zoom in on the rabbit next to the much bigger elephant. This supports the Analog Code. 4. Philip N. Johnson-Laird : says mental models are built to solve spatial problems; believes in a continuum approach . Know THIS figure: 1. What is the analog code? – Roger Shepard Images in the mind are like real images It takes time to rotate them Physical properties are like real items Machinery running mental images is the same (the real perceptual and motor regions of the brain) Maps take time to travel in the mind (and actual space) The representation is a good analogy for actual physical space and objects 2. What is a propositional code? - Zenon Pylyshyn Images in the mind are Epiphenomenal The representations are really verbal The picture only comes in at the end (tacked on) The knowledge isn’t stored as a picture in the head Since we can do things with images that are actually impossible – it’s not an analog code 3. Which is closer to language (analog or propositional code)? Propositional 4. Which is closer to vision (analog or propositional code)? Analog 5. What results support an analog code? Shepard and Metzler did the classic study of mental rotation - People were shown images, usually between 1 or 2 seconds, then asked to judge whether the pairs were the same or different. By doing this project the person had to use mental manipulation of the object, and by the time they had to
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decide the object is gone. They found that there is a linear increase in reaction time for judgment. We
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