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44 Cards in this Set
- Front
- Back
Syntax
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Study of phrase/sentence structure and rules governing how words are combined to form phrases/sentences
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Lexical Categories
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nouns
verbs adjectives adverbs determiners prepositions |
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Thematic Role
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- Part played by specific entity in an event
- verb is important in determining thematic roles played by nouns in a sentence - in many languages they are indicated through word order |
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Surface Structure vs. Deep Structure
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Surface Structure= final sentence produced
Deep Structure = conceptual plan of where thematic roles are assigned Ex: D: Cat scratched the dog S: The dog was scratched by the cat *All sentences start from underlying structure, D structure will always appear as S structure |
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Syntactic Transformation
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Syntactic Rule that can move an element from one position to another
- Transforms D structure to S structure |
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Obvious Mapping
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Active Sentence
The bee stung the boy. |
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Non Obvious Mapping
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Passive Sentence
The boy was stung by the bee. |
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Agrammatism
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- Sentence Comprehension Deficit
- Often seen with expressive agrammatism in Broca's Aphasia - Broca's area and other perisylvian language areas are involved - Identified through psycholinguistic testing, not clinical observation or self-report - Theoretical significance is in testing modularity of syntactic processing - just because you have Broca's does not mean you have agrammatism and vice versa |
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Features of Agrammatism
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- Chance performance or worse in identifying agent thematic roles for reversible passives
- poor performance on syntactic structures that do not follow canonical word order - inability to recognize grammatical function words and suffixes |
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Theories of Agrammatism
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Trade-off hypothesis
Trace Deletion Hypothesis |
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Examples of Offline Tasks
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- Sentence Picture Matching
(Select picture that best matches sentence) - Acting out Sentence (use toys or hands to act out sentence) - grammaticality judgement (judge whether sentence is grammatical or not) PROBLEMS: Not a good test of automatic sentence processing, affected by working memory and strategy formulation |
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Trade-Off Hypothesis
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**patients have a syntactic impairment only in tasks with high cognitive demands
- Agrammatic aphasics are sensitive to task demands - offline tasks with high cognitive demands (ex: sentence-picture matching) = syntactic parsing impaired, heuristic strategy used to identify thematic roles - offline tasks with low cognitive demands (ex: grammaticality judgement) = syntactic parsing intact, no heuristic strategy needed |
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Sentence Picture Matching: Results
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- patients made no lexical errors (did not select pictures with lexical changes)
- patients made syntactic errors but only for reversible sentences (selected this image 50% of the time) |
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Agrammatics and Sentence Comprehension (With Pragmatics)
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Agrammatic aphasics can use world knowledge to correctly interpret sentences
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Agrammatics and Sentence Comprehension (With Syntactic Parsing)
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Use syntactic cues to correctly assign thematic roles
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Heuristic Strategy
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-Shortcut to interpretation of simple sentence constructions
1) noun = subject/agent 2) noun = object/theme |
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Trace Deletion Hypothesis
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**patients have a syntactic impairment involving the assignment of traces, which are missing from their syntactic representations
- Agrammatic Aphasics have impairment in syntactic knowledge - Deficit is not modulate by task demands - Aphasics know how to assign thematic roles to NPs when NPs have not moved (when they are moved, interpretation depends on traces) - Aphasics syntactic representations do not have traces - they apply an agent-first heuristic strategy to moved constituents (when subject moves it works, when object moves there are 2 agents so patients guesses) |
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Cross-modal lexical priming (CMLP)
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There are certain places in the sentences that we would expect priming, and at late stages in the sentence we would not expect it to be because of previous info that was given, because that was too far away
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Trace Reactivation
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-Control subjects were primed at trace but not pretrace
- Agrammatic Broca's aphasics have no priming, difficulty processing traces |
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Early Left anterior negativity (ELAN)
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~100-300 ms
- elicited with violations of category expectations - earliest thing we have in seeing violation in sentence categorization (this time is when initial syntactic structure is formed) **this is disrupted in Broca's Aphasics! |
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Left anterior negativity (LAN)
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~300-500 ms
- elicited with syntactic agreement violations and grammatical sentences with long-distance dependencies - LAN measures all the specific aspects of language - No LAN is elicited by number or gender violations between antecedent and reflexive pronoun - other languages have better LAN component because you MUST mark gender or case |
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P600
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~500-800 ms
- elicited with subject-verb agreement violations, verb inflection violations, case inflection violations, phrase structure violations, syntactically ambiguous/garden path sentences - sustained in incorrect sentences - p600 is preserved in Broca's Aphasics |
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Discourse Comprehension
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- requires construction of a mental "model" that reflects understanding of the situation described in the discourse
- model is updated as new info becomes available - requires micro- and macro-structure - |
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Discourse Macrostructure
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RIGHT
- using thematic and topical knowledge to organize sentences into unified whole - Right Hemisphere Damage patients unaffected by presence or absence of theme, Left and Control were affected (worse when no theme) - Right damage patients are much less accurate when theme is given late |
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Inferences
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Information that is assumed and incorporated in text even if not explicitly stated
** right hemisphere damage prevents activation of semantic information necessary to generate coherence inferences ** less accurate in judging T/F inference statements ** difficulty suppressing initial inference and cannot alternate or revise inferences |
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Coherent Inferences
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- fill in missing information to resolve later contradiction between early and later information
- drawn automatically |
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Predictive Inferences
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- predicts future consequence of story events
- help elaborate the story |
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Humor Comprehension Stages
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- inferences
- incongruity detection - incongruity resolution |
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Right Hemisphere Damage patients are _______ accurate in selecting joke completions than controls
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less
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Right Hemisphere Damage patients select _______ endings most often in their jokes.
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Slapstick
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In metaphoric responses, Right Hemisphere Damaged patients chose _____ responses just as often as metaphoric responses.
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Literal
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There is more Right Brain activation at the ____ of a story.
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End
the patient must form a coherent representation of the whole story and therefore activate the right brain |
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_______ shows more activation for untitled passages
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RH middle temporal sulcus
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_______ shows more activation for titled passages
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LH middle temporal sulcus
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___ is sensitive to inferences earlier than ____
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Right hemisphere
Left hemisphere |
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______ is important for activation and integration of inference-related meaning
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Superior Temporal Gyrus
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Over _____ percent of the world is bilingual
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50
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In critical period hypothesis, L1 is acquired ______ while L2 is acquired ______.
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Implicitly, explicitly
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Convergence Theory
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Early stages of L2 acquisition may recruit more brain areas, but when L2 reaches proficiency then the areas overlap
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Linguistic Components of ASL
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- handshape
- movement - location - palm orientation |
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Common between sign and spoken language
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Left Hemisphere is specialized for processing linguistic information
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Distinct between sign and spoken languages
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spoken more dependent on left, sign more dependent on right hemisphere (visual-spatial processing)
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____ hemisphere damage signers are significantly impaired
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Left
(make way more paraphrases, and are less accurate) |
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Sign Language Comprehension involves the _____ (area in brain)
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left posterior temporal lobe (Wernicke's area)
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