Unit 7: Thinking, Language, and Intelligence
How the mind organizes ideas into categories, builds and understands language, solves problems, and how intelligence itself gets defined and measured.
9 topics · 33 questions
Each topic is a path, not a menu: work down it in order and every question builds on the one above. Click any of them to watch the answer draw itself.
7.1 Concepts, Prototypes, and Schemata
- How it worksHow does a prototype let you quickly judge how typical a new example is of a category?
- How it worksWalk me through how a schema shapes what you notice and remember about a new experience.
- Going furtherWhat happens to your memory of an event when it doesn't fit your existing schema for that situation?
- Worked exampleFind why a penguin takes longer to verify as a bird than a robin does, despite both technically qualifying.
Your turn1 of 2
Most people can verify 'a robin is a bird' almost instantly, but take noticeably longer to verify 'a penguin is a bird,' even though both are technically birds. What does this delay reveal about how categories are mentally represented?7.2 The Structure of Language: Phonemes to Sentences
- How it worksHow do phonemes combine into morphemes, and morphemes combine into the words and sentences you speak?
- How it worksWalk me through how syntax lets the same words in a different order completely change a sentence's meaning.
- Worked exampleFind how many distinct phonemes combine to form the spoken word cat.
Your turn1 of 2
The sentence 'The dog bit the man' and the sentence 'The man bit the dog' use the exact same words, yet describe completely different, almost opposite events. What language feature is responsible for this difference in meaning?7.2 Language Acquisition and the Critical Period
- How it worksHow does the critical period hypothesis explain why language is acquired more easily early in life?
- Going furtherWhat happens to language development in a child who isn't exposed to language at all until after adolescence?
- Ties togetherHow does the critical period for language connect to the sensitive periods seen in early attachment?
Your turn1 of 2
A toddler who moves to a new country picks up the local language with a native-sounding accent within a couple of years, while an adult who has studied the same language intensively for a decade still speaks with a noticeable accent. What does the critical period hypothesis say about this difference?7.3 Problem-Solving Strategies and Cognitive Biases
- How it worksHow does an algorithm guarantee a solution while a heuristic only makes one more likely?
- How it worksWalk me through functional fixedness stopping someone from seeing a common object's uncommon use.
- Common mistakeWhy doesn't a solution feeling obvious in hindsight mean it was easy to find in the first place?
- Going furtherWhat happens to a decision when the availability heuristic makes a rare event feel common?
Your turn1 of 2
To find a lost word in a word-search puzzle, one person checks literally every possible letter combination in the grid systematically, guaranteed to eventually find it. Another person instead scans for common letter patterns and likely word shapes, which is faster but might occasionally miss the word. Which strategy is the algorithm, and which is the heuristic?7.4 Theories of Intelligence and Creativity
- How it worksHow does Spearman's general intelligence differ from Gardner's theory of multiple intelligences?
- How it worksWalk me through how Sternberg's triarchic theory splits intelligence into analytical, creative, and practical parts.
- Going furtherWhat is the actual relationship between a person's measured intelligence and their creativity?
- Common mistakeWhy isn't a high IQ the same thing as being highly creative?
Your turn1 of 2
One researcher argues that a single general intelligence factor underlies performance across many different mental tasks, since people who do well on one type of cognitive test tend to do reasonably well on others too. A different researcher instead argues that intelligence is really several distinct, largely independent abilities, like musical, bodily-kinesthetic, and interpersonal intelligence. Which two theorists and theories are being contrasted?7.5 The History of IQ Testing
- How it worksHow did Binet's original test compare a child's mental age to their actual age to produce an intelligence quotient?
- How it worksWalk me through what the WAIS actually measures across its different subtests today.
- Common mistakeWhy isn't an IQ score meant to capture every kind of intelligence a person has?
Your turn1 of 2
Using the original ratio IQ formula, IQ = (mental age divided by chronological age) times 100, what is the IQ of a child with a mental age of 12 years and a chronological age of 11 years?7.5 The Normal Distribution of IQ Scores
- How it worksHow does an IQ test's scoring get built so that the scores form a normal distribution?
- Worked exampleFind what percentage of the population scores between 85 and 115 on an IQ test with a mean of 100 and standard deviation of 15.
- Worked exampleFind how rare an IQ score of 145 is compared to the mean of 100 on the standard IQ distribution.
- Common mistakeWhy doesn't a small difference in average IQ between two large groups say anything meaningful about any one individual?
Your turn1 of 2
On an IQ test with a mean of 100 and a standard deviation of 15, a person scores 122. How many standard deviations above or below the mean is this score? (A negative value means below the mean.)7.6 Heritability and Environment in Intelligence
- How it worksHow do twin and adoption studies separate the genetic and environmental contributions to intelligence?
- Common mistakeWhy doesn't a heritability estimate of 0.7 for intelligence mean seventy percent of any one person's IQ came from their genes?
- Going furtherWhat happens to the heritability of intelligence when environments become more equal across a population?
- Worked exampleFind why identical twins raised apart still show a stronger IQ correlation than fraternal twins raised together.
Your turn1 of 2
Identical twins raised apart show an IQ correlation of 0.739, while fraternal twins raised together show an IQ correlation of 0.43. Using heritability = 2 times (identical-twin correlation minus fraternal-twin correlation), what is the estimated heritability, as a decimal?7.6 Intellectual Disability and Learning Disabilities
- How it worksHow does dyslexia disrupt the brain's processing of written language without affecting overall intelligence?
- Common mistakeWhy isn't a learning disability the same thing as low intelligence?
- Going furtherWhat changes about a diagnosis of intellectual disability when adaptive functioning is considered alongside the IQ score?
- Worked exampleFind why a student with dyscalculia can reason brilliantly in a class discussion but struggle with basic arithmetic on a test.
Your turn1 of 2
A bright, articulate high school student who contributes brilliant insights in class discussion struggles intensely to decode words while reading a simple paragraph aloud, reading far below grade level. A classmate assumes this student must simply have low overall intelligence. What is the more accurate explanation?