Language - Wofford Collegewebs.wofford.edu/boppkl/courseFiles/Cognition/CogPPT10... ·...
Transcript of Language - Wofford Collegewebs.wofford.edu/boppkl/courseFiles/Cognition/CogPPT10... ·...
Language
Definition: shared symbolic system for communication
Human speech vs Sign language vs Animal
communication
Linguistic universals
Semanticity: meaningful
Arbitrariness: random connection between sound and
meaning
Flexibility of symbols: can change
Naming: everything can be named
Displacement: future or past tense
Productivity or generativity: can create new
Language research
Psycholinguistics
Chomsky’s “Syntactic structures”
General structure and rules of language
Acquisition
Comprehension
Spoken or written
Words to sentences
Production
Physical and mental
Representation of info
Neuroscience
Broca’s and Wernicke’s areas
Structure of language
Structure RULES Grammar: complete set of rules to produce sentence
Phonology: sounds into words
Syntax: word order into sentences
Semantics: communicate meaning (word or sentence)
Word level Phonemes: smallest units of sound ( /b/ )
Morphemes: smallest unit with meaning
Lexicon: knowledge of word meaning, sounds, etc.
Sentence level Hierarchy: words - phrases - sentences
Pragmatics: social rules
Perceiving words
Phonemic restoration effect Warren (1970): cough replaces phoneme
Speech segmentation Pronunciation of words in sentence different than alone
• Coarticulation – sounds mush together
Pollack & Pickett (1964): only 50% acc for recognizing individual words Ss previously said within a conversation
Understanding words
Question: What factors influence ability to understand words?
Word frequency effect
Lexical decision method
Faster RT for high frequency vs low frequency words
Context effects
Identify words alone or in conversational speech
Faster RT if words fit expected schema for sentence
Lexical ambiguity
Lexical priming method
Words can have multiple meanings – need context of sentence to clarify
Semantic ambiguity
Garden path sentences
Lexical decision
Meyer & Schvaneveldt (1971)
Priming task: word activates lexicon
RT task for word pairs: Word or non-word?
Experiment 1: y/n both words?
Pairs: Associated words, unassociated,
word-nonword, nonword-word, nonwords
Simultaneous presentation of stimuli
Experiment 2: same/different judgment
Meyer & Schvaneveldt (1971) Exp 1: Y/N both words?
RT of correct responses Y-N task
400
600
800
1000
1200
Associated Unassoc W-non Non-W Non-Non
Associated vs. unassociated: 85ms difference
Serial decision model: 2-stage decision process
1st non-word: quick N decision
Word-nonword pair: more errors b/c fast Y to word
Lexical ambiguity
Lexical ambiguity Swinney (1979)
Examine access to meaning of ambiguous words
Method: Listen to sentence & lexical decision
Results: RT same to “ant” and “spy” when hear “bug” 200ms later: “ant” faster
Conclusion: Context takes time
“Rumor had it for years, the govmt
building had been plagued with problems.
The man was not surprised when he
found several spiders, roaches, and other
bugs in the corner of the room.”
Syntactic ambiguity “The spy saw the man with the binoculars”
How do we separate a sentence into smaller phrases
Mechanism: Parser
Syntax-first approach
Use syntax to infer meaning
Late closure: “B/c he always jogs a mile seems like a short distance to him.”
Method: garden-path sentence
“The horse raced past the barn fell.”
“The horse (that) raced past the barn fell.”
Temporal ambiguity
Interactionist approach
Simultaneous use of semantics and syntax
Tanenhaus et
al. (1995)
Eye-tracker
“Put the apple
on the towel in
the box.”
Interactionist
approach
support
Semantics
“Colorless green ideas sleep furiously”
Semantics can overpower syntax
Fillenbaum (1974): paraphrase sentences
Change expected meaning (“don’t print that or I won’t sue you”)
Change order of sentences (“John went into the store and got off the bus”)
Findings: Reordered sentences
Conclusions: Effect of top-down processing and schemas
Semantic grammar approach
Begin to analyze the sentence immediately
Process: role of words contributes to overall comprehension
Garden path sentences
“After the musician had played the piano was quickly taken off stage.”
Eye-tracker: eyes fixate longer when encounter error
Is language innate or learned?
Nativist (Chomsky)
Innate language acquisition device (LAD)
Localization of language in brain
Behaviorist (Skinner)
Reinforcement and imitation
Gradual mastery
Interactionist
Combine innate capacity and social environment
Syntax
Chomsky’s theory
Proposed innate language
skills
Phase structure grammar
• Allows for generativity
“Visiting relatives can be a
nuisance.”
Transformational rules:
• Surface: actual words
• Deep: meaning of sentence
• Transformational rules:
Conversion of deep to
surface structure
Deep vs surface structure
“Change the towels in the green bathroom”
“Dust the furniture”
“Draw the drapes when the sun comes in”
“Trim the fat before you put the steak in the icebox”
“And please dress the chicken”
“Lexical ambiguity”
Do these speakers think differently
b/c of how they talk?
English: “the elephant ate the peanuts”
Mandarin: when event occurred is optional separate word
Russian: need tense and gender on verb, and if ate all or portion of the peanuts
Turkish: must specify if event was witnessed or hearsay
US English: “making money”
English: front/back terms for time
Mandarin: also up/down metaphors for time
Sapir-Worf hypothesis
or Linguistic relativity hypothesis
Language shapes how we think and perceive
Strong version: controls thoughts
Weak version: influences thoughts
Another alternative: Changes what we pay attention to
Cross-cultural tests
Roberson et al (2000):
Color identification for British and Berinmo (New Guinea)
Result: British 8 color names; Berinmo 5
Categorical perception: harder to discriminate stimuli in same category
British Ss
Berinmo Ss
Boroditsky’s et al. (2002)
Spanish and German speakers tested in English
Examine objects with opposite grammatical gender assignments in 2 languages
Experiment 1: Proper names assigned to objects Apple = Patrick or Patricia
Results: Consistent object-name was remembered better
Experiment 2: Name 3 adjectives for objects Results: adjectives consistent with grammatical gender
• German “key”: hard, heavy, jagged, metal, useful
• Spanish “key”: golden, intricate, little, lovely, shiny
Experiment 3: Rated similarity of pictures of objects and people
Results: Similarity ratings consistent with grammatical gender