Thinking, Reasoning, and Language: Chapter 8 Study Notes

Thinking, Reasoning, and Language

Introduction

This chapter explores the cognitive processes underlying human thinking, reasoning, and language. It covers how children acquire language, the structure and function of language, problem-solving strategies, and the role of analogies in reasoning.

Review: Children's Testimony and Memory

Reliability of Children's Statements

• Validity of Testimony: Young children’s statements may be influenced by suggestive or leading questions, making their testimony less reliable.

• Sam Stone Study: Examined how children can be led to remember events that never happened through suggestion.

• Suggestive Questions: Questions that imply or lead a child toward a particular answer, increasing the risk of false memories.

• False Memories: Children can be made to "remember" events that never occurred, especially through repeated questioning.

• Use of Anatomically Correct Dolls: Intended to reduce the number of questions, but may not always lead to more valid testimony.

• Distinguishing Truth: Separating real memories from imagined or suggested events is challenging in young children.

Language: Structure and Components

Definition and Importance

• Language: A system of communication that combines symbols or gestural signs in rule-based ways to create meaning.

• Sentences: Coherent sequences of words expressing the intended meaning of a speaker.

• Phonemes: The smallest distinctive sound units in a language.

• Morphemes: The smallest language units carrying meaning.

• Syntax: The grammatical rules for constructing sentences.

Example: The sentence "Man turns cat into helicopter" uses syntax and morphemes to convey meaning.

Noam Chomsky & the Language Acquisition Device

Chomsky's Theory

• Associationist View: Earlier theories suggested language was learned through conditioning.

• Chomsky's Critique: General learning principles are inadequate for language acquisition.

• Language Acquisition Device: Chomsky proposed an innate mechanism enabling children to analyze and produce language rapidly.

• Deep vs. Surface Structure: Deep structure refers to underlying meaning; surface structure is the actual spoken form.

• Generativity: Children produce novel sentences, not just mimic adults.

Example: "The dog chased the cat" and "The cat was chased by the dog" have different surface structures but the same deep meaning.

Cooing and Babbling

Early Language Development

• Cooing: At about 2 months, babies make vowel-like noises.

• Babbling: At 4-5 months, babies add consonant sounds to cooing; by 7-8 months, they produce real adult speech sounds.

• Universal Babbling: Babies produce sounds common across all languages, not just their native language.

• Role of Hearing: Hearing is necessary for normal language development; deaf babies babble with their hands.

Example: Deaf infants produce linguistic structures in sign language babbling similar to spoken language babbling.

Language Sounds and Perception

Speech Segmentation and Sound Discrimination

• Speech Segmentation: Infants can isolate words and discern rules for word order in their native language.

• Conditioned Head-Turn Procedure: Used to study infants' ability to distinguish speech sounds.

• Universal Linguists: Up to 7 months, infants can distinguish sounds from any language; this ability declines by 10 months.

Example: Infants rewarded for turning their head when a new sound is played, showing discrimination before the sound appears.

Perceiving Complex Sounds

Sound Categorization

• Segmentation: By 8 months, infants pick out words from speech streams based on syllable co-occurrence.

• Categorical Perception: Infants group similar sounds and distinguish them from different categories.

• Voice Onset Time (VOT): The time between releasing a sound and the onset of voicing; used to differentiate sounds like "ba" and "pa".

Example: Infants and some animals (chinchillas, macaques) categorize speech sounds, suggesting general auditory properties.

Concepts and Word Learning

Mapping Words to Concepts

• Mapping: Linking new words to concepts enables children to apply words to various objects.

• Overextension: Applying a word too broadly (e.g., calling all four-legged animals "doggie").

• Underextension: Applying a word too narrowly.

• Fast Mapping: Rapidly learning new words and concepts (up to 500 new words a month).

• Constraints on Word Meanings:

  • Whole-object bias: Tendency to map a word to an entire object.

  • Shape bias: Generalizing words to objects of similar shape.

  • Mutual exclusivity: Assuming a novel word refers to an object not already named.

Example: A child learns "bunny" refers to a rabbit, not a synonym for an object already named.

Grammar and Generativity of Language

Understanding Grammatical Structure

• Single-word Speakers: Even babies speaking single words can understand complex grammar.

• Grammatical Structure: Development of grammar is not solely dependent on practice or feedback.

• Generativity: Ability to produce novel sentences by combining words in new ways.

Example: Babies can identify the correct picture when hearing "the dog was bitten by the cat" versus "the cat was bitten by the dog".

Linguistic Rules and Overgeneralization

Learning Language Rules

• Implicit Learning: Children learn rules without explicit awareness, possibly through implicit memory.

• Overgeneralization: Applying rules too broadly (e.g., "goed" instead of "went").

• U-shaped Development: Children initially use correct forms, then overgeneralize, and finally return to correct usage.

Example: Children say "Yesterday, we goed" before learning the irregular past tense "went".

The Critical Period for Language Acquisition

Age and Language Learning

• Critical Period: Younger children are better at learning languages; after a certain age, acquisition becomes more difficult.

• Feral Children: Cases like Genie and Victor of Aveyron show limited language development after isolation.

• Second Language Learning: Adults face more challenges learning a second language than children.

Example: Genie, isolated until age 13, never fully acquired language; Isabelle, rescued at age 6.5, learned English rapidly.

Teaching Human Language to Animals

Animal Language Studies

• Chimpanzees: Early research failed due to vocal limitations.

• Bonobos: Learn better as young animals, through observation, and use symbols for social interaction, but cannot master complex syntax.

• Parrots: Alex the African gray parrot could speak and solve tasks, but language was imitative, not generative.

Example: Kanzi the bonobo could not master syntactic rules beyond a 2.5-year-old human child.

Language Automaticity: The Stroop Effect

Stroop Demonstration

• Stroop Task: Naming the ink color of words that spell different colors demonstrates automaticity and selective attention.

• Prefrontal Cortex Damage: Patients with damage show impaired selective attention and inhibition.

Example: Saying "RED" when the word is printed in blue ink takes longer than when the word and ink color match.

Solving Problems: Heuristics and Algorithms

Problem-Solving Strategies

• Heuristics: Simple, efficient rules for making judgments and solving problems; faster but more error-prone.

• Algorithms: Step-by-step procedures that guarantee a solution; slower but more reliable.

• Matchstick Problem: Arranging six matches to form four equilateral triangles requires creative thinking.

Example: The solution to the matchstick problem involves constructing a three-dimensional tetrahedron.

Functional Fixedness and Mental Set

Barriers to Problem Solving

• Functional Fixedness: Tendency to see objects as having only their usual function, hindering creative solutions.

• Mental Set: A predisposition to approach problems in a particular way, which can limit options.

• Nine Dot Problem: Solving requires breaking out of the mental set that lines must stay within the square.

Example: Using a box as a platform rather than a container in the candle problem.

Analogies in Problem Solving

Using Analogies to Find Solutions

• Analogical Reasoning: Applying knowledge from one situation to another can aid problem solving.

• Tumor Problem: Solved more easily when participants are given an analogous story (the Fortress Problem).

• Research Findings: 92% solved the tumor problem with an analogy; only 20% without the hint.

Example: Using multiple low-intensity rays from different directions to destroy a tumor without harming healthy tissue, analogous to dividing an army to avoid landmines.

Table: Key Terms and Concepts

Term	Definition	Example
Phoneme	Smallest unit of sound	"b" in "bat"
Morpheme	Smallest unit of meaning	"un-" in "undo"
Syntax	Rules for sentence structure	"The cat chased the dog"
Heuristic	Simple problem-solving strategy	Rule of thumb
Algorithm	Step-by-step procedure	Long division
Functional Fixedness	Limited use of objects	Box as container only
Mental Set	Predisposed problem approach	Drawing lines inside a square
Overextension	Applying word too broadly	Calling all animals "doggie"
Underextension	Applying word too narrowly	"Dog" only for family pet

Equations and Formulas

• Voice Onset Time (VOT):

$\text{VOT} = \text{Time between release of lips and onset of voicing}$

Additional info: These notes expand on the original slides by providing definitions, examples, and context for key concepts in language acquisition, problem solving, and reasoning, suitable for exam preparation in a college psychology course.