Copgras Delusion
Essay by review • December 5, 2010 • Research Paper • 827 Words (4 Pages) • 1,219 Views
* Copgras Delusion
o Occurs when the amygdala is disconnected from the visual cortex
o People have no emotional response to objects that they see
o Ex. Man who though his parents were imposters
* Does not occur over phone conversations
* Recognition
o Occurs at 114 msec or 10 times/second or 1/10 sec
o It is when a match between perceptual input and a pattern (mental representation) in memory exceeds some criterion and conscious awareness of the pattern occurs
o Rapid and unconscious
o Temporal lobe
* Lower portion of the temporal lobe which extends forward from the visual cortex is the declarative pathway of the visual system
 It compares visual representations with representations of familiar faces and words
* Middle portion of the temporal lobe which surrounds auditory area, organizes features matching auditory input into representations of phonemes
* Logogen Model
o A logogen is a criterion node that determines when the comparison between the input and representation in memory has made a match
o A point where all the representations of a word come
o The more of a perceptual representation that matches, the higher the activation
o When the activation exceeds the criterion for the word represented by the logogen it is perceived and recognized
o Accounts for word recognition
* Frequency effect
o High frequency words have low thresholds
* If you use it a lot you are more conscious of it
o Low frequency words have a higher threshold
o The more that you see it, the better you are at processing it so you do it faster and see them quicker
o Masking studies show evidence
* Words more likely to be reported than non-words, high frequency more that low frequency
* Redundant Pathways
o 3 parallel pathways for recognizing printed words
* Visual whole word pathway activates meaning directly
* Auditory whole word pathway activates sound of word and meaning through auditory pathway
* Letter sequence sounds word out phonetically letter by letter
 Takes longer
 Speed affected by number of letters in word
 Low frequency exception words will produce more mistakes
* Proofreading
o Because we use whole word pathway errors are difficult to detect in high-frequency words and words that preserve the shape
o Homophone errors may be difficult to detect
* Backward mask- mask is last
* Forward mask- mask is first
* Priming
o The presentation of an item which affects the reaction time or probability with which another item is subsequently perceived
o Subliminal
* Activation of a node higher than its resting state but not higher than the threshold so later it will require less subsequent activation and will be easier to process
* Requires a mask
o Visible
* May or may not need masking
* Activated higher than threshold but is lowered
o Repetition
* Each presentation increases the activation until they exceed criterion
o Form priming
* Words activate the words in their neighborhood
o Semantic
* Activation spreads along semantically related logogens
* Neely study
o When there is a fast presentation you use automatic primes
o When there is a slow presentation you use an expectation
* Structural descriptions
o Fire hydrant
o You have an expectation of what to see and when they don't your reaction time is slower
* Elements related by semantics and spatial associations
* Evolution of language system
o Larynx lowered
o Laterlization of brain
* Broca's area- speech production
* Wernicke's area- speech perception
* Rand and Kimora studies
o You can only pay attention to one sound at a time
* Phonemes
o Smallest parts of speech
o Phonemes->words->phrases
* Cooing vs. babbling
o Cooing child makes random phonemes from all languages
o At 6 mths only produce phonemes of language being acquired
* Propositions
o The purpose of language is to construct propositions (comprehension)
o The
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