10. Language and Thought: Foundations, Universals, and Influence on Cognition

Language and Thought

Introduction

This section explores the nature of language, its universal properties, the extent to which language is innate or acquired, and the influence of language on thought. Understanding these concepts is central to cognitive psychology and the study of human intelligence.

What is Language?

Defining Language

• Language is a structured system of communication unique to humans, characterized by complex rules and generativity.

• It differs from animal communication in its symbolic, generative, and hierarchical nature.

• Language serves as a social tool for communication among humans, relying on shared knowledge and conventions.

Linguistic Universals

• Interpersonal: Language is used for communication between individuals.

• Arbitrary Reference (Symbolic): Words are symbols that stand for objects, actions, or ideas without inherent connection.

• Hierarchical and Rule-Governed: Language is organized into levels (phonology, morphology, syntax, semantics, pragmatics) and follows grammatical rules.

• Generative and Recursive: Language allows the creation of infinite new sentences by embedding structures within structures (recursion).

Levels of Language Structure

• Phonology: The study of the smallest units of sound (phonemes).

• Morphology: The study of the smallest meaningful grammatical units (morphemes).

• Syntax: The rules for combining words into sentences (e.g., Subject-Verb-Object order in English).

• Semantics: The meaning of words and sentences.

• Pragmatics: The use of language in context and the interpretation of meaning beyond literal words.

Example: The sentence "Colgate constructed the new library quickly" can be analyzed at each level: phonology (sounds), morphology (word parts), syntax (word order), semantics (meaning), and pragmatics (contextual meaning).

Innate Aspects of Language

What is Built In?

• Language Instinct: Steven Pinker argues that humans have an innate capacity for language acquisition.

• Infant Phoneme Perception: Research (Eimas, Miller & Jusczyk, 1987) shows that infants can distinguish between all phoneme contrasts at birth, but lose this ability for non-native contrasts as they grow.

• Home Sign: Deaf children of hearing parents spontaneously create their own sign systems, demonstrating an innate drive for language (Goldin-Meadow, 2005).

• Critical Period: Cases like Genie (a child deprived of language exposure) show that certain aspects of language must be acquired early in life.

Example: In the Eimas, Miller & Jusczyk (1987) study, infants' sucking rates changed when they heard different phonemes, indicating discrimination ability. Japanese infants, for example, lose the ability to distinguish "la" and "ra" if not exposed to both sounds.

Acquired Aspects of Language

Resilient vs. Fragile Properties

• Resilient Properties: Aspects of language (e.g., basic word order) that are minimally sensitive to environmental input and can be learned at any age.

• Fragile Properties: Aspects of language (e.g., pronunciation, plurals, tense markers) that are highly sensitive to environmental input and must be learned early, typically before age 13.

• Neuroplasticity: The brain's ability to adapt and prune unused phonemes based on language exposure.

Example: Genie could not acquire fragile properties of language after years of deprivation, highlighting the importance of early exposure.

Does Language Influence Thought?

The Whorfian Hypothesis

• Whorfian Hypothesis (Linguistic Relativity): The language you speak influences how you perceive and think about the world.

• Color Perception: Studies (Winawer et al., 2007) show that Russian speakers, who have more words for shades of blue, distinguish colors differently than English speakers.

• Spatial Cognition: Some languages use absolute directions (north, south) rather than relative (left, right), affecting spatial reasoning (Levinson, 1996).

• Agency: Language structure can influence how events are described and remembered (Fausey & Boroditsky, 2011), e.g., "John broke the egg" vs. "The egg broke."

Example: Bilingual individuals may experience shifts in personality or perception depending on the language they are using.

Nature vs. Nurture in Language Acquisition

Debate Overview

• Nature: Some aspects of language are innate (e.g., Pinker's language instinct), influencing perception and cognition.

• Nurture: Other aspects are sensitive to environmental input and must be learned through exposure (e.g., Whorfian hypothesis).

• Both nature and nurture contribute to language development and its influence on thought.

Summary Table: Properties of Language

Property Type	Description	Example	Sensitivity to Environment
Resilient	Basic aspects, minimally sensitive to input	Word order (SVO in English)	Low
Fragile	Complex aspects, highly sensitive to input	Pronunciation, tense markers	High

Key Terms

• Phoneme: Smallest unit of sound in a language.

• Morpheme: Smallest meaningful grammatical unit.

• Syntax: Rules for sentence structure.

• Semantics: Meaning of words and sentences.

• Pragmatics: Language use in context.

• Recursion: Embedding structures within structures in language.

• Critical Period: Optimal window for acquiring certain language properties.

• Whorfian Hypothesis: Language influences thought and perception.

Additional info: Academic context and definitions have been expanded for clarity and completeness. Some examples and explanations are inferred from standard psychology textbooks.