Chapter 7: Thinking and Intelligence Study Notes

What Is Cognition? * Cognition is simply defined as thinking. * It involves the mental processes associated with perception, knowledge, problem-solving, judgment, language, and memory. * Cognition is a complex and essential feature of human consciousness, though not all aspects of cognition are experienced consciously. * Cognitive Psychology: This is the field of psychology dedicated specifically to examining how people think. # Concepts and Prototypes * Information Processing: Stimuli enter through the senses and are converted into neural impulses by the nervous system; these impulses are then processed by the brain into thoughts, which manifest as language or memory. * Mental Synthesis: The mind synthesizes information gathered from sensory input, emotions, and memories. * Organization: To organize vast amounts of information, the mind functions like a "file cabinet." * Concepts: These act as the "files" in the cabinet. They are categories or groupings of linguistic information, images, ideas, or memories (such as life experiences). These concepts are informed by semantic memory. * Prototype: This is defined as the best example or representation of a specific concept. # Types of Concepts and Schemata * Natural Concepts: These are created "naturally" through direct or indirect life experiences. * Artificial Concepts: These are defined by a specific, rigid set of characteristics. * Schema: A schema is a mental construct consisting of a cluster or collection of related concepts. Schemata are methods of organizing information that allow the brain to work more efficiently. * Role Schema: This involves making assumptions about how individuals in certain social or professional roles will behave. * Event Schema (Cognitive Script): A set of behaviors that can feel like a routine. # Components of Language * Lexicon: Refers to the words of a given language, commonly known as vocabulary. * Grammar: The set of rules used to convey meaning through the use of the lexicon. * Phonemes: The basic sound units of a language; words are formed by combining these units. * Morphemes: The smallest units of language that convey some kind of meaning, formed by combining phonemes. * Semantics: A component of grammar referring to the process by which we derive meaning from morphemes and words. * Syntax: A component of grammar referring to the specific way words are organized into sentences. # Language Development and Communication * Critical Period: There is a critical period for language acquisition early in life. * Newborn Capabilities: Newborns show a distinct preference for their mother's voice and can distinguish between the language their mother speaks and other languages. * Phoneme Discrimination: While babies are initially attuned to the languages used around them and can differentiate sounds from all languages (even those not in their environment), by $1$ year of age, they can only distinguish between phonemes used in the language(s) of their environment. * Babbling Stage: Occurs at a few months old; involves repeating single syllables. This is not yet a conscious attempt to communicate. * First Words: Typically occurs between $12$ and $18$ months of age. This is followed by a "one-word stage" for several months. * Vocabulary Expansion: As the lexicon grows, children begin forming simple sentences and acquiring new vocabulary rapidly. * Overgeneralization: Evidence of a clear understanding of grammar rules, where a child extends a general rule to an exception ($e.g.$, saying "go-ed" instead of "went"). # Stages of Language and Communication Development (Table $7.1$) * Stage $1$ ($0-3$ months): Reflexive communication. * Stage $2$ ($3-8$ months): Reflexive communication and an interest in others. * Stage $3$ ($8-13$ months): Intentional communication and sociability. * Stage $4$ ($12-18$ months): First words. * Stage $5$ ($18-24$ months): Simple sentences of two words. * Stage $6$ ($2-3$ years): Sentences of three or more words. * Stage $7$ ($3-5$ years): Complex sentences and the ability to hold conversations. # Problem-Solving Strategies and Pitfalls * Problem-Solving Strategy: A plan of action used to find a solution. * Trial and Error: Continuing to try different solutions until the problem is solved ($e.g.$, restarting a phone, turning off WiFi, and turning off Bluetooth to determine the cause of a malfunction). * Algorithm: A step-by-step problem-solving formula ($e.g.$, an instructional video for installing new software). * Heuristic: A general problem-solving framework, such as working backwards or breaking a task into smaller steps. * Mental Set: A pitfall where one persists in approaching a problem in a way that has worked previously but is no longer effective. * Functional Fixedness: A specific type of mental set where one cannot perceive an object being used for anything other than what it was originally designed for. # Decision Biases * Anchoring: The tendency to focus on one particular piece of information when making decisions or solving problems. * Confirmation: Focusing specifically on information that confirms existing beliefs. * Hindsight: The belief that an event just experienced was predictable after the fact. * Representative: The unintentional stereotyping of someone or something. * Availability: Making a decision based on an available precedent or an example that may be faulty. # Theories of Intelligence * Spearman's General Intelligence ($G$): Proposes one general factor that can be measured and compared among individuals. Intelligence is seen as a basic cognitive trait comprising the ability to learn, reason, and solve problems regardless of their nature. * Cattell's Fluid vs. Crystallized Intelligence: * Fluid Intelligence ($G_f$): Used to adapt to new situations and solve new problems without relying on previous knowledge. * Crystallized Intelligence ($G_c$): Relies on extensive experience and knowledge; tends to be stable and robust. * Sternberg's Triarchic Theory: * Analytical Intelligence: "Book smarts." * Practical Intelligence: "Street smarts." * Creative Intelligence: The ability to generate new ideas. * Gardner's Multiple Intelligences: A model claiming there are $8$ different, independent forms of intelligence. * Emotional Intelligence: Often considered a combination of Gardner's intra- and interpersonal intelligences; involves perceiving, understanding, managing, and using emotions. * Cattell-Horn-Carroll (CHC) Theory: The most comprehensive theory to date. Abilities are arranged in a hierarchy: * Top: General intelligence. * Middle: Broad abilities ($e.g.$, fluid reasoning, short-term memory, processing speed). * Bottom: Narrow/specific abilities (the only ones that can be directly measured; these are integrated within other abilities). # Creativity * Definition: The ability to generate, create, or discover new ideas, solutions, and possibilities. * Divergent Thinking: Thinking "outside the box" to find multiple solutions. * Convergent Thinking: The ability to provide a correct or well-established answer or solution to a problem. # Intelligence Testing and Measurement * Stanford-Binet Test: Originally an achievement test by Alfred Binet and Theodore Simon to measure mental age. Louis Terman modified it for adults (Stanford-Binet Intelligence Scale). * Intelligence Quotient (IQ): Developed by William Stern. Formula: $ext{IQ} = \frac{ ext{Mental age}}{ ext{Chronological age}} imes 100$. * Standardization and Norming: Facilitates comparison across individuals. * Mean: The average score. * Standard Deviation ($ext{\sigma}$): Describes how data are dispersed in a population and provides context to large data sets. * Representative Sample: A subset of a population that accurately represents the general population. # The Wechsler Adult Intelligence Scale (WAIS) * Comprehensive test consisting of: * Full Scale IQ. * General Ability Index. * Cognitive Proficiency Index. * Specific Indices: * Verbal Comprehension Index: Similarities, Vocabulary, Information. * Perceptual Reasoning Index: Block design, Matrix reasoning, Visual puzzles. * Working Memory Index: Digit span, Arithmetic. * Perceptual Speed Index: Symbol search, Coding. # The Flynn Effect * Observed as the steady population-wide increase in intelligence test scores over time ($1942$ to $1992$). * Data shows significant rises in Britain, Netherlands, Israel, Norway, and Belgium. # Sources of Intelligence: Nature vs. Nurture * Heritability: Studied using twin and adoption studies. The Minnesota Study of Twins Reared Apart revealed a genetic component to intelligence. * Genetic Complexity: There is no single "genius" gene; intelligence is a polygenic trait. * Range of Reaction: The theory that intelligence is shaped by the interaction between a child's genetic potential and their developmental environment. * Environmental Factors for Rising IQ: * Nutritional supplements for pregnant mothers and newborns. * Quality preschool experiences. * Interactive reading programs. * Health and nutrition. * Socioeconomic status and income level. * Environmental Hindrances: Malnutrition, sensory deprivation, and social isolation. # Learning Disabilities * Definition: Cognitive disorders affecting specific areas of cognition, particularly language or reading; these are distinct from intellectual disabilities. * Dysgraphia: A struggle to write legibly; physical writing is challenging. * Dyslexia: The most common childhood learning disability; it involves the inability to correctly process letters because the neurological mechanism for sound processing does not work properly. * Dyscalculia: Difficulty in learning or comprehending arithmetic.