Grammar Architecture: Modularity and Generative Grammar in Cognitive Science
Foundations of Cognitive Science and Language
Language as a Mirror of the Mind:
Studying language helps us understand how the human mind works, how it creates thoughts, and how it organizes mental representations (Noam Chomsky).
Linguistic structure reveals the innate, biologically built-in properties of human thought.
Cognitive Science and the Mind:
Definition: The scientific study of thought and mental processes, viewing the mind as the primary organ of cognition.
History: Formed during the 1970s and 1980s to unite different disciplines studying the mind under a shared framework.
Fields within Cognitive Science:
Neuroscience: Studies the physical brain, tracks patterns of brain activity, and develops neuroimaging tools.
Computer Science: Explores artificial intelligence (), computational models, and algorithmic information processing.
Cognitive Psychology: Investigates mental behavior, including attention, working memory, and long-term memory retrieval.
Anthropology: Studies culture as a communication network connecting human minds, similar to how the internet connects computers.
Linguistics: Studies language as a symbolic system of communication, using native speaker judgments to find grammar rules.
Psycholinguistics: Investigates how the brain comprehends and produces language in real time.
The Computational Architecture of the Brain and Representation
The Brain as an Information Processor:
The brain functions by transforming sensory inputs into mental representations.
It addresses how physical inputs (such as light waves) become mental concepts (such as colors).
It studies how different mental modules communicate with one another internally.
Neurolinguistics, Localization, and Distributed Network Theories
Brain Specialization and Localization:
Strict Localization: The hypothesis that specific cognitive operations are handled by distinct, dedicated brain regions.
Broca's Area: In 1861, Paul Broca documented patient "Tan," who lost the ability to speak due to left frontal lobe damage but could still understand speech.
Modern Findings on Localization:
Broca's area is active in language, but also in non-language tasks like movement preparation, action imitation, and sequencing.
Motor and visual areas also activate during language processing.
Distributed Network Theories:
Even simple mental tasks require an orchestrated network of scattered brain regions.
Language relies on widely distributed neural networks rather than a single isolated center.
Modularity of Mind and Linguistic Architecture
Modularity (Jerry Fodor, 1983):
The mind is composed of distinct, specialized computational modules rather than one general-purpose system.
Domain Specificity: Each module processes only one specific type of information (e.g., vision handles sight, audition handles sound).
Language as Modular Subsystems:
Language breaks down into separate modules: phonology (sounds), morpho-syntax (word and sentence grammar), semantics (meaning), and pragmatics (context).
Modules still exchange information (e.g., visual lip-reading aids auditory speech perception in noisy environments).
Linguistic Methodologies: Description versus Explanation
Traditional Taxonomic Linguistics:
Focuses on classifying and cataloging surface structures.
Groups words into parts of speech using three criteria:
Semantic Properties: Word meaning.
Morphological Properties: Word forms and inflections.
Syntactic Properties: Word order and sentence position.
Describes language patterns without explaining the mental architecture behind them.
Chomskyan Cognitive Linguistics:
Views grammar as an internal, biologically grounded mental organ.
Tacit Knowledge: Native speakers have subconscious grammatical knowledge; they generate and understand sentences effortlessly without conscious knowledge of the formal rules.
Three Core Theoretical Dimensions:
Theory of Structure: Hierarchical organization of language.
Theory of Acquisition: First language () development and second language () learning.
Theory of Use: How internal grammar interacts with memory, pragmatics, and social dynamics.
Linguistics versus Psycholinguistics:
Linguistics: Objectively catalogues speech sounds, syntax, morphology, registers, and language evolution without prescriptive judgments.
Psycholinguistics: Uses experiments to study real-time processing, such as translating sounds into meaning in under and selecting target words from tens of thousands of mental entries.
Competence, Performance, and Universal Grammar
Competence versus Performance:
Linguistic Competence (): The ideal, subconscious knowledge of the grammar system inside a speaker's mind.
Linguistic Performance (): Actual language use in real life, which can include slips of the tongue, fatigue, distractions, and memory limits.
Modern linguistics focuses on competence to uncover internalized language architecture.
First Language Acquisition ():
Children acquire language by abstracting general rules, not through simple imitation.
Overregularization: Children apply regular grammar rules to irregular forms they have never heard adults say:
Plural errors: saying childs instead of children.
Past-tense errors: saying drinked instead of drank.
Question formation: asking Is I can do that?
Generativism versus Behaviorism:
Behaviorism (B.F. Skinner): Claimed language is learned through imitation, habit formation, and reinforcement.
Generativism (Noam Chomsky): Refuted behaviorism by showing that the human brain is finite, yet produces an infinite variety of novel sentences using a finite set of recursive rules.
Linguistic Creativity and Recursion:
Changing word order changes meaning (e.g., She has what a man wants vs. She wants what a man has).
Recursion allows sentences to expand indefinitely in length:
Adding adjectives: a smart, tall, smiling girl…
Adding prepositional phrases (): The girl [in jeans] [with long hair] [on the stage]…
Clausal embedding: This is the cat [that killed the rat [that ate the malt…]]
Coordinating with conjunctions (and, or).
Criteria for a Theoretical Grammar:
Universality: Must have the descriptive power to account for all human languages.
Maximally Constrained: Must allow all and only naturally occurring human grammars.
Native Speaker Intuitions and Structural Well-Formedness
Linguistic Intuitions:
Native speakers instinctively judge whether a sentence sounds well-formed, even for sentences they have never encountered before.
Categories of Sentence Status:
Pragmatically Odd: Grammatically correct, but clashes with real-world common sense (e.g., Mary murdered the chair).
Semantically Ill-Formed: Contains a logical contradiction (e.g., Mary murdered Tom, but he didn’t die).
Syntactically Ill-Formed (Ungrammatical): Violates structural word-order rules (e.g., Murdered Tom Mary).
Ambiguous: Open to multiple interpretations (e.g., You could not go to the party).
Descriptivism, Prescriptivism, and Sociolinguistic Variation
Descriptive versus Prescriptive Grammars:
Descriptive Linguistics: Analyzes language as it naturally exists in the mind without value judgments; categorizes expressions as grammatical or ungrammatical, not correct or incorrect.
Colorless green ideas sleep furiously shows that a sentence can be syntactically grammatical while lacking meaning.
Prescriptive Linguistics: Enforces arbitrary social rules and stylistic preferences.
All natural dialects are fully rule-governed and logically expressive.
Historical Prescriptions:
Many prescriptive English rules were created in the 18th century to mimic Classical Latin (e.g., outlawing double negatives like I don't have none in favor of I don't have any).
Spoken versus Written Language:
Spoken Language: Primary, natural, acquired without formal instruction, and carries intonational nuances.
Written Language: Secondary cultural artifact shaped by formal education and prescriptive rules.
Types of Language Variation:
Idiolect: The unique speech habits of an individual person.
Dialect: A regional or social variety with distinct phonology, vocabulary, and grammar.
Sociolect: A language variety tied to a particular socioeconomic or social group.
Accent: Phonological and pronunciation differences alone.
Dimensions of Dialectal Differences:
Phonological: Vowel shifts, consonant changes (glottal stops, flapping), and rhoticity (pronouncing or dropping the "r" sound).
Lexical: Different words for the same item (e.g., British petrol vs. American gas; motorway vs. freeway).
Syntactic: Minor grammatical variations (e.g., between you and me vs. between you and I).
Formal Structural Analysis: Case Studies
Case Study 1: Transitive Construction
Target Sentence: The psychotherapist has locked the naughty schoolgirl in the office.
Structural Breakdown:
Phonetics and Phonology: Differences in accents (Standard Southern British vs. General American) affect vowel sounds, rhoticity, and consonant aspiration.
Morphology:
psychotherapist: compound stem (psycho- + therapy) + agent suffix -ist.
locked: root lock + past inflection -ed (pronounced as a voiceless stop).
schoolgirl: compound noun (school + girl).
Syntax: Standard English clause structure: Subject Noun Phrase + Auxiliary Verb + Transitive Verb + Object Noun Phrase + Prepositional Phrase.
Semantics and Pragmatics: Compositional meaning of words and situational context (whether the event was punitive, medical, or accidental).
Case Study 2: Clausal Complement Construction
Target Sentence: The shaman believes that the cactus triggers altered states of consciousness.
Structural Breakdown:
Morpho-Syntax:
triggers: verb root + 3rd person singular suffix -s.
altered: verb root + participial adjective suffix -ed.
consciousness: adjective root + nominal suffix -ness.
Syntax: Complex sentence containing a main clause (The shaman believes…) and an embedded complement clause introduced by that (…that the cactus triggers altered states of consciousness).