Cognition - Lecture 10 (Memory)
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- Created on: 04-04-16 20:28
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- Lecture 10 - Memory
- Change blindness and the transition from "iconic" to visual working memory (VSTM)
- Different attributes of objects presently in the visual field are represented by local activity in multiple visual cortex "maps"
- Separate maps for features such as movement, colour
- The sensory activity persists beyond the stimulus offset ("sensory memory") unless overwritten by a new retinal image, but not for long
- While it remains available, binding of features by focal attention creates "object files" in a visual working memory
- Different attributes of objects presently in the visual field are represented by local activity in multiple visual cortex "maps"
- Images vs. propositional representations
- Physical images
- Decipit
- In an analogue manner
- Are spatially isomorphic with what they represent
- Propositional representations:
- Describe (objects, features)
- Use discrete symbols
- Have conventional/arbitary correspondence between symbol and symbolised
- Physical images
- Kosslyn's image-scanning experiments
- S memorising map, which is then removed
- Instructed to "focus" mentally on place
- The name of another place is then presented
- S is interested to "look for" that place in their mental image, pressing one key when they find Y, another if they cannot, as quickly as possible
- Rosslyn concludes:
- S is "scanning" a mental image of the scene much as one would scan an exterior scene or a picture with eye movements
- Change blindness and the transition from "iconic" to visual working memory (VSTM)
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