THE COGNITIVE REVOLUTION IN LANGUAGE THEORY
1. Introduction: From Behavior to Mind
Mentalism marks a decisive intellectual rupture in the study of language learning. Where behaviorism reduced language to observable habit formation, mentalism re-centers the inquiry on the internal architecture of the human mind.
In Second Language Acquisition (SLA), mentalism proposes that language learning cannot be adequately explained through stimulus and reinforcement alone. Instead, it must be understood as a manifestation of innate cognitive structures, mental representations, and biologically endowed linguistic capacity.
At the heart of this shift lies Noam Chomsky’s Universal Grammar (UG), which redefined language acquisition as an expression of human cognitive endowment rather than environmental conditioning.
2. Historical and Intellectual Context: The Cognitive Turn
Mentalism emerged in the mid-20th century as part of a broader cognitive revolution in psychology and linguistics. This movement rejected the behaviorist exclusion of mental states and re-legitimized the study of:
internal cognitionmental representation
abstract rule systems
innate structures of the mind
The central figure of this transformation was:
Noam Chomsky, whose critique of B.F. Skinner’s Verbal Behavior (1959) dismantled behaviorist explanations of language acquisition.
Chomsky argued that behaviorism could not explain:
the creativity of languagethe rapid acquisition of grammar in children
the poverty of stimulus problem
This intellectual break gave rise to generative grammar and the theory of Universal Grammar, reshaping linguistics and SLA permanently.
3. Core Theoretical Framework of Mentalism
Mentalism in SLA is grounded in several interconnected claims:
3.1 Language as an Internal Cognitive System
Language is not external behavior but an internal mental grammar.
3.2 Innateness Hypothesis
Humans are biologically equipped with a specialized capacity for language acquisition.
3.3 Universal Grammar (UG)
All human languages share underlying structural principles that are innate.
3.4 Poverty of the Stimulus
Children acquire complex grammatical systems despite insufficient environmental input, implying internal structure guides learning.
3.5 Rule-Based Competence
Language is governed by abstract, hierarchical rules rather than surface-level imitation.
4. Universal Grammar and the Architecture of Language
Universal Grammar is the central construct of mentalist SLA theory.
It proposes that:
Human beings are born with a pre-specified set of linguistic principles that constrain possible human languages.
4.1 Principles and Parameters Model
Chomsky later refined UG into:
- Principles: universal constraints shared by all languages
- Parameters: language-specific settings that vary across languages
Example:
- English requires explicit subjects: John eats apples
- Spanish allows subject drop: Come manzanas
The learner’s task is not to construct grammar from scratch but to set parameters based on input.
4.2 Recursion and Generativity
A key feature of UG is recursion:
The ability to embed structures within structures.
Example:
“The boy [who saw the dog [that chased the cat]] ran home.”
Recursion explains the infinite productivity of language, allowing finite rules to generate infinite sentences.
5. Mechanisms of Second Language Acquisition in Mentalism
From a mentalist SLA perspective, learning proceeds through internal cognitive processes:
Stage 1: Input Processing
Learners receive linguistic input and unconsciously analyze its structure.
Stage 2: Hypothesis Formation
The mind generates internal hypotheses about grammatical rules.
Stage 3: Parameter Setting
Learners adjust UG parameters based on exposure to L2 data.
Stage 4: Interlanguage Development
A transitional mental grammar emerges between L1 and L2 systems.
Stage 5: Refinement and Restructuring
Continuous modification of internal rules leads toward target-language competence.
Crucially, learning is not imitation, but mental restructuring.
6. SLA Implications and Pedagogical Influence
Mentalism fundamentally reshaped language teaching philosophy:
6.1 Decline of Mechanical Drills
Behaviorist repetition was no longer seen as sufficient for grammar acquisition.
6.2 Focus on Input Quality
Exposure to structured, meaningful input became central.
6.3 Emergence of Cognitive Approaches
Teaching began to emphasize:
rule awarenessgrammatical competence
mental processing
comprehension-based instruction
6.4 Influence on Modern SLA Theories
Mentalism directly influenced:
- Krashen’s Input Hypothesis
- Processability Theory
- Interlanguage theory (Selinker)
- Cognitive SLA models
7. Empirical Research in Mentalist SLA
Mentalism relies on methodologies that probe internal cognition:
- grammaticality judgment tasks
- reaction time experiments
- syntactic processing studies
- neuroimaging (fMRI, EEG)
- error analysis (as evidence of internal rules)
Research focus includes:
- how learners represent grammar mentally
- how L1 influences L2 parameter setting
- whether UG remains accessible in adulthood
- how interlanguage systems evolve cognitively
8. Critiques and Limitations
Despite its influence, mentalism faces significant critiques:
8.1 Lack of Direct Observability
Mental representations cannot be directly measured.
8.2 Overemphasis on Universality
Cross-linguistic diversity challenges strict universals.
8.3 Reduced Role of Social Interaction
Mentalism underestimates communication and context.
8.4 UG Debate
The existence of a fully innate, language-specific module remains contested.
8.5 Adult SLA Problem
Adults rarely achieve native-like competence, raising questions about UG accessibility after critical periods.
9. Contemporary Relevance
Mentalism continues to shape modern SLA in several domains:
9.1 Cognitive Linguistics
Language is studied as a mental symbolic system.
9.2 Neurolinguistics
Brain imaging supports the idea of specialized language processing networks.
9.3 Artificial Intelligence
Neural network models loosely parallel mentalist ideas of internal representation.
9.4 SLA Research
Interlanguage theory and cognitive models remain foundational in understanding learner development.
Thus, mentalism survives not as a final theory, but as a cognitive backbone of SLA inquiry.
10. Summary
Mentalism transformed SLA by relocating language acquisition from observable behavior to internal cognitive structure. Through Chomsky’s Universal Grammar, language learning became understood as an innate, rule-governed process shaped by mental architecture rather than environmental conditioning alone.
