Chapter 8: Cognition, Language, and Intelligence

I. Cognition

Definition: Mental activity involving acquiring, processing, and using knowledge.
Key Components:

  1. Thinking – Decision-making, problem-solving, belief formation.

  2. Concepts – Mental categories (e.g., "dog," "justice").

    • Types:

      • Natural Concepts (learned through experience, e.g., "bird").

      • Formal Concepts (defined by rules, e.g., "triangle").

    • Prototypes – Best examples of a category (e.g., a robin is a prototype for "bird").

      • Limitations: Prototypes fail with ambiguous cases (e.g., is a whale a fish or mammal?).

  3. Problem-Solving Strategies:

    • Trial & Error – Random attempts (effective for inventions like Edison’s lightbulb).

    • Algorithms – Step-by-step methods (guaranteed solution, but slow).

    • Heuristics – Mental shortcuts (fast but error-prone, e.g., "availability heuristic").

    • Insight – Sudden realization ("Aha!" moment).

  4. Cognitive Biases:

    • Confirmation Bias – Favoring info that supports preexisting beliefs.

    • Mental Set – Relying on past strategies (even if ineffective).

    • Fixation – Inability to see alternative solutions.

  5. Intuition – Quick, automatic judgments (efficient but prone to errors like overconfidence).

II. Language

Definition: System of symbols (sounds, words, gestures) for communication.
Structure:

  1. Phonemes – Smallest sound units (e.g., /b/ in "bat").

  2. Morphemes – Meaningful units (e.g., "un-" + "happy").

  3. Grammar – Rules for combining words (syntax, semantics).

Language Development:

  • Humans acquire ~10 new words/day from ages 2–18.

  • Critical Period Hypothesis: Language must be learned early (by age 7) for full proficiency.

  • Brain Areas:

    • Broca’s Area – Speech production (damage causes difficulty forming sentences).

    • Wernicke’s Area – Language comprehension (damage leads to fluent but nonsensical speech).

Theories of Acquisition:

  • Nature (Nativist Theory) – Innate ability (Noam Chomsky’s "universal grammar").

  • Nurture (Behaviorist Theory) – Learned through reinforcement (Skinner).

  • Statistical Learning – Infants detect patterns in speech.

Special Cases:

  • Deaf Children: Sign language follows the same developmental stages as spoken language.

  • Aphasia – Language impairment due to brain damage (e.g., stroke).

III. Intelligence

Definition: Ability to learn, solve problems, and adapt.

Intelligence Testing

  1. Alfred Binet – Developed first IQ test to identify children needing educational support.

    • Mental Age – Comparison of cognitive ability to chronological age.

  2. Stanford-Binet Test – Revised by Terman; introduced IQ (Intelligence Quotient):

    IQ = Mental Age / Chronological Age ​× 100

  3. Wechsler Scales (WAIS/WISC) – Measure:

    • Verbal comprehension

    • Processing speed

    • Working memory

Types of Tests:

  • Aptitude Tests – Predict future learning (e.g., SAT).

  • Achievement Tests – Assess acquired knowledge (e.g., final exams)

  • Fluid Intelligence

    • Definition: The ability to think logically, solve new problems, and adapt to unfamiliar situations.

  • Crystallized Intelligence

    • Definition: The ability to use learned knowledge, facts, and experience.

Theories of Intelligence

  1. General Intelligence ("g") – Spearman’s idea of a single underlying ability.

  2. Multiple Intelligences (Gardner) – 8+ independent abilities (logical, musical, spatial).

  3. Triarchic Theory (Sternberg) –

    • Analytical (Componential) – Problem-solving.

    • Creative (Experiential) – Novel solutions.

    • Practical (Contextual) – Street smarts.

  4. Emotional Intelligence (Goleman) – Ability to:

    • Perceive emotions (e.g., reading facial cues).

    • Manage emotions (e.g., self-regulation).

    • Use emotions for motivation.

Learning Differences

  • Dyslexia – Reading difficulty.

  • Dyscalculia – Math difficulty.

  • Dysgraphia – Writing difficulty.

Creativity

Sternberg’s 5 Components:

  1. Expertise (knowledge base).

  2. Imaginative thinking.

  3. Venturesome personality.

  4. Intrinsic motivation.

  5. Supportive environment.

Key Takeaways

  1. Cognition involves thinking, problem-solving, and biases (e.g., confirmation bias).

  2. Language is structured (phonemes → grammar) and acquired through nature/nurture.

  3. Intelligence is multifaceted (IQ tests, Gardner’s theory, emotional intelligence).

  4. Creativity requires knowledge, risk-taking, and motivation.