Thinking, Reasoning, and Language: Study Notes

Thinking, Reasoning, and Language

Introduction

This chapter explores the cognitive processes underlying human thought, decision-making, problem-solving, and language. It examines how we process information, make judgments, solve problems, and acquire and use language, highlighting both the efficiency and limitations of our mental strategies.

Thinking and Cognitive Economy

Definition of Thinking

• Thinking refers to any mental activity or processing of information, including learning, remembering, perceiving, communicating, believing, and deciding.

• Humans are described as cognitive misers, meaning we tend to invest as little mental energy as possible in processing information (cognitive economy).

• Quick judgments, such as those based on limited observation (thin slicing), are common due to cognitive economy.

Heuristics and Biases

Heuristics

• Heuristics are mental shortcuts that increase thinking efficiency but can lead to errors.

• Common heuristics include:

  • Representativeness heuristic: Judging the probability of an event by its similarity to a prototype, often ignoring base rates.

  • Availability heuristic: Estimating the likelihood of an event based on how easily examples come to mind.

  • Hindsight bias: Overestimating how well we could have predicted an outcome after it has occurred.

Top-Down Processing

Concepts and Schemas

• Top-down processing streamlines cognitive functioning by using pre-existing knowledge to fill in gaps.

• Concepts are our knowledge and ideas about a set of objects, actions, or characteristics that share core properties.

• Schemas are organized knowledge structures or mental models that we've stored in memory.

Language and Thought

Linguistic Determinism and Relativity

• Linguistic determinism is the (largely unsupported) view that all thinking is represented linguistically.

• Linguistic relativity (Sapir-Whorf hypothesis) suggests that language shapes some aspects of perception, memory, and thought, but is not the sole determinant.

• It is difficult to separate language effects from cultural differences.

Decision-Making and Problem Solving

Decision-Making

• Decision-making involves selecting among alternatives, often using two systems:

  • System 1: Fast, automatic, intuitive thinking.

  • System 2: Slow, deliberate, analytical thinking.

• Framing effects can influence decisions even when the underlying information is identical (e.g., "5% chance of winning" vs. "95% chance of losing").

• Overanalyzing can lead to "paralysis by analysis." It is important to avoid relying solely on intuition, especially when evaluating scientific evidence.

Problem Solving

• Problem solving is the process of generating a cognitive strategy to accomplish a specific goal.

• Algorithms are step-by-step procedures that guarantee a solution.

• Other strategies include breaking problems into subgoals and using analogies.

• Obstacles to problem solving include:

  • Salience of surface similarities: Focusing on irrelevant details.

  • Mental sets: Becoming stuck in a specific strategy.

  • Functional fixedness: Difficulty seeing objects as having functions other than their usual one.

Models of the Mind

• Early models compared the mind to a computer, but newer embodied accounts emphasize that our knowledge is organized to simulate real experiences.

Language: Structure and Acquisition

Definition and Features of Language

• Language is an arbitrary system of communication that combines symbols (words or signs) in rule-based ways to create meaning.

• It serves both informational and social/emotional functions and is highly practiced and automatic.

Levels of Language Analysis

• Phonemes: Fundamental units of sound in a language (about 40-45 in English).

• Morphemes: Smallest units of meaning (e.g., "dog", "re-").

• Syntax: Rules for constructing sentences, including word order and structure.

• Extralinguistic information: Non-content elements (e.g., facial expressions, tone) that aid interpretation.

Phoneme Distinction Table

Phoneme Pair	Example	Language with Distinction	Language without Distinction
R/L	Rid/Lid	English	Japanese
S/Z	Ice/Eyes	English	Spanish
K/Kh	Keep/Cool	Arabic	English
D/T/TH	Doll/Tall/No English Example	Hindi	English

Language Dialects

• Dialects are variations of a language used by specific groups, with consistent syntax rules that may differ from mainstream speech.

Evolution and Function of Language

• Language requires significant learning and brain power, suggesting its advantages (complex communication, social coordination) are substantial.

• Phonemes, morphemes, and syntax are generally arbitrary, with exceptions like onomatopoeia and sound symbolism.

Language Development in Children

Babbling and Phoneme Recognition

• Babbling is intentional vocalization without meaning, emerging before age one and helping infants gain control over their vocal tracts.

• Phoneme recognition develops between 8 and 12 months.

Learning Words and Syntax

• Comprehension precedes production; children recognize words before they can say them.

• Children recognize their own name by 6 months and comprehend other words by 10-12 months.

• Word production begins around 1 year, with rapid vocabulary growth and common over- and under-extension of word meanings.

• Syntactic development involves combining words into phrases, progressing from one-word to two-word stages by age two.

Sign Language

• Sign language, used by deaf communities, has all the features of spoken language and follows similar developmental stages.

• Deaf babies "babble" with their hands.

Bilingualism

• Early exposure leads to greater proficiency; most bilinguals have a dominant language but are proficient in both.

• Bilinguals show heightened metalinguistic insight and may use different brain areas depending on when the second language is learned.

Language Deprivation

• Cases like "Genie" suggest a sensitive (not strict critical) period for language development; the younger the learner, the better the outcome.

Theories of Language Acquisition

• Imitation: Children learn language by hearing and mimicking adults, but this does not explain the generative nature of language.

• Nativist: Children are born with innate knowledge of language structure (Chomsky's language acquisition device), though this is hard to test empirically.

• Social pragmatics: Social context and environment structure language learning, requiring infants to infer others' intentions.

• General cognitive processing: Language learning is a result of general cognitive skills, but children learn language better than adults despite adults' overall cognitive superiority.

Nonhuman Animal Communication

• Animal communication varies in complexity and is usually related to mating and aggression.

• Attempts to teach animals human language have had limited success; humans appear unique in their sophisticated language use.

Reading: Acquisition and Challenges

Learning to Read

• Reading, like language, becomes automatic with practice.

• Key prerequisites for reading include understanding that writing is meaningful, recognizing the direction of writing, identifying letters, and knowing that letters correspond to sounds.

• Expert readers master both whole word recognition and phonetic decomposition (sounding out unfamiliar words).

The Stroop Effect

• The Stroop effect demonstrates the automaticity of reading: naming the color of ink is harder when the word spells a different color.

Speed Reading

• The average reading speed is 200-300 words per minute (WPM).

• Comprehension drops significantly above 400 WPM; speed reading courses may increase speed but reduce understanding.