Intelligence: What It is and Isn't

• A. The amount of formal schooling a person has completed
• B. The ability to learn from experience, reason, and adapt to new situations ✓
• C. The speed at which a person can perform physical tasks
• D. The total amount of knowledge a person has memorized

Why: Psychologists generally define intelligence as the capacity to learn from experience, reason through problems, and adapt to new or changing situations. It is not defined by schooling, physical speed, or memorized facts alone, though those may be related outcomes.

• A. Crystallized intelligence
• B. Fluid intelligence
• C. The g factor ✓
• D. Emotional quotient

Why: Spearman observed that scores on different mental tests were positively correlated and proposed a general factor, which he labeled 'g,' that contributes to performance on all cognitive tasks, alongside task-specific factors.

• A. Solving a novel puzzle with no prior instructions
• B. Quickly spotting patterns in an unfamiliar sequence of shapes
• C. Using accumulated vocabulary and general knowledge to answer a trivia question ✓
• D. Adapting quickly to a new software interface without training

Why: Crystallized intelligence refers to knowledge and skills built up through education and experience, such as vocabulary and general information. Novel puzzle-solving and rapid pattern recognition reflect fluid intelligence, the ability to reason flexibly with new material.

• A. It can only be measured with brain scans
• B. It is inferred from patterns of behavior and test performance rather than seen directly ✓
• C. It changes completely from one day to the next
• D. It is identical for every person regardless of environment

Why: Intelligence is a theoretical construct: we cannot directly observe it, so researchers infer it from consistent patterns in how people perform on cognitive tasks and adapt in real life.

• A. Intelligence is entirely determined by genetics at birth
• B. Intelligence has no measurable relationship to real-world outcomes
• C. Intelligence reflects both genetic influences and environmental experiences ✓
• D. Intelligence cannot be measured in any reliable way

Why: Research shows intelligence is substantially influenced by both heredity and environment, including education, nutrition, and opportunity. Intelligence tests do show reliable measurement and meaningful, if partial, links to outcomes such as academic and occupational performance.

• A. Intellectual Quotient
• B. Intelligence Quotient ✓
• C. Internal Quality index
• D. Integrated Questioning measure

Why: IQ stands for Intelligence Quotient. The term comes from the ratio of mental age to chronological age, multiplied by 100, used in early childhood testing by William Stern and Lewis Terman.

• A. Charles Spearman
• B. Howard Gardner
• C. Alfred Binet ✓
• D. Robert Yerkes

Why: Alfred Binet and Théodore Simon created the Binet-Simon scale in 1905 to identify French schoolchildren who needed extra educational support. Binet himself warned against treating the scores as a fixed measure of innate ability.

• A. A perfect score on the test
• B. The minimum score needed for university admission
• C. The average score for the population being tested ✓
• D. The score that indicates genius-level intelligence

Why: Modern IQ tests are normed so that the average score for the reference population is 100, with most scores falling within about 15 points of that average (one standard deviation).

• A. They measure every aspect of human intelligence equally well
• B. They cannot capture creativity, emotional intelligence, or practical skills fully ✓
• C. They produce identical results regardless of test-taker mood or motivation
• D. They are perfectly consistent across all cultures without adjustment

Why: IQ tests focus mainly on certain cognitive abilities such as reasoning, memory, and problem-solving. They do not fully measure creativity, emotional intelligence, practical know-how, or motivation, and performance can be affected by culture, language, and test anxiety.

• A. It consistently produces similar results when the same person takes it again ✓
• B. It measures exactly what it claims to measure
• C. It is accepted by all psychologists as correct
• D. It is easy for most people to complete

Why: Reliability refers to consistency of measurement. A reliable IQ test gives similar scores across repeated administrations. Validity, by contrast, is about whether the test measures what it is intended to measure.

• A. Alfred Binet
• B. Howard Gardner ✓
• C. Charles Spearman
• D. Raymond Cattell

Why: Howard Gardner proposed the theory of multiple intelligences in his 1983 book Frames of Mind, arguing that intelligence is not a single general ability but a set of distinct, relatively independent capacities.

• A. Linguistic intelligence
• B. Musical intelligence
• C. Mathematical intelligence
• D. Emotional quotient ✓

Why: Gardner's original list included linguistic, logical-mathematical, musical, spatial, bodily-kinesthetic, interpersonal, and intrapersonal intelligences. 'Emotional quotient' is a separate construct developed by other researchers, not one of Gardner's original intelligences.

• A. It accepts the existence of a general intelligence factor
• B. Its intelligences are not clearly shown to be independent of one another ✓
• C. It relies entirely on brain imaging evidence
• D. It was never published in a academic venue

Why: Critics argue that Gardner's intelligences are not empirically distinct; in psychometric studies, abilities across domains tend to correlate positively, supporting a general factor (g) rather than fully independent intelligences.

• A. A genetic marker for intelligence
• B. A statistical factor reflecting the shared variance among diverse cognitive tests ✓
• C. A measure of emotional maturity
• D. The average score on a single test

Why: Charles Spearman introduced 'g' as a statistical factor extracted from correlations among different cognitive tests, representing a general ability underlying performance across many tasks.

• A. Matching instruction to a student's preferred intelligence reliably improves learning
• B. There is little rigorous evidence that tailoring teaching to a student's supposed intelligence profile improves outcomes ✓
• C. Learning styles are fully supported by neuroscience
• D. Intelligence profiles are fixed at birth and cannot be measured

Why: Many researchers have found little empirical support for the claim that teaching matched to a 'learning style' or intelligence profile improves achievement, which is one reason the theory's educational applications are widely criticized.

• A. Half of an individual's IQ is determined by their genes.
• B. Half of the variation in IQ scores within a particular population is associated with genetic differences among individuals in that population. ✓
• C. An individual's IQ will be exactly halfway between their parents' IQ scores.
• D. Environmental factors contribute half as much to IQ as genetic factors do for every person.

Why: Heritability is a population-level statistic describing the proportion of variance in a trait attributable to genetic differences within a specific population and environment. It says nothing about how much of any single individual's trait is genetic.

• A. The environment shared by all people on Earth.
• B. Environmental influences that make children raised in the same family more similar to one another. ✓
• C. The genetic material shared between identical twins.
• D. The school environment that all students in a district experience equally.

Why: Shared (or common) environment refers to family-level influences such as parenting style, household income, and neighborhood, which tend to make siblings more alike. Twin and adoption studies are used to estimate its contribution.

• A. Twins always have identical IQ scores, which proves genetic control.
• B. Comparing identical (monozygotic) and fraternal (dizygotic) twins allows researchers to separate genetic and environmental contributions, since they share different proportions of their genes. ✓
• C. Twins are raised in laboratories where environments can be precisely controlled.
• D. Twins develop intelligence at the same rate, making them easy to measure.

Why: Identical twins share nearly all their genes while fraternal twins share about half on average. If identical twins are more similar in IQ than fraternal twins, this suggests a genetic contribution. Twins raised apart offer additional leverage.

• A. The idea that genes and environments never influence each other.
• B. The process where a child's genetic predispositions shape which environments they seek out or respond to, and vice versa. ✓
• C. The fact that environments can change the DNA sequence of a person's genes.
• D. A measure of how much genes and environment add up to total IQ.

Why: Gene-environment interaction means the effect of a genetic predisposition depends on the environment, and environments can be shaped by genes. For example, a child with curiosity may seek out stimulating books, amplifying differences over time.

• A. Heritability of IQ drops to zero by adulthood.
• B. Heritability of IQ generally increases from childhood into adulthood. ✓
• C. Heritability of IQ is the same at every age and never changes.
• D. Heritability of IQ is only measurable in people over age 90.

Why: Studies such as those in the Minnesota Study of Twins Reared Apart suggest heritability of IQ is lower in early childhood and rises into adulthood, a pattern sometimes called the 'Wilson effect.' Shared family environment's influence tends to decline with age.

• A. A test measuring a machine's processing speed against human reaction times
• B. A test in which a human judge tries to distinguish a machine's text responses from a human's, based on conversation alone ✓
• C. A physical test requiring robots to perform everyday manual tasks
• D. A mathematical proof that all computers are capable of solving any problem

Why: Turing proposed the imitation game, in which a judge converses via text with a hidden human and a hidden machine. If the judge cannot reliably tell which is which, the machine is considered to exhibit intelligent behavior. The test focuses on behavior rather than internal mechanisms.

• A. That computers can never be built fast enough to simulate the human brain
• B. That a system can manipulate symbols to produce correct outputs without understanding what the symbols mean ✓
• C. That language is impossible for machines to process at all
• D. That human intelligence is identical to computer programming

Why: Searle imagined a person who follows rule-books to manipulate Chinese characters, producing appropriate replies without understanding Chinese. He argued this shows that syntactic symbol manipulation alone does not amount to semantic understanding, challenging claims that running the right program is sufficient for a mind.

• A. Artificial general intelligence
• B. Narrow AI ✓
• C. Superintelligence
• D. Embodied cognition

Why: Narrow AI (also called weak AI) is built for a particular task or domain. It contrasts with artificial general intelligence (AGI), which would match human flexibility across a wide range of tasks, and superintelligence, which would exceed human capabilities.

• A. The tendency for AI systems to become more energy-efficient over time
• B. The tendency to dismiss a capability as 'not real intelligence' once a machine can perform it ✓
• C. The observed rise in public trust toward AI after successful demonstrations
• D. The phenomenon where neural networks spontaneously develop new programming languages

Why: The AI effect describes how, once a task such as chess play or translation is accomplished by machines, people tend to redefine intelligence to exclude it, saying it was 'just computation.' This shifting standard makes it hard to settle debates about what counts as genuine intelligence.

• A. It shows that AI systems are always more difficult to program than humans
• B. It asks why and how physical processes give rise to subjective experience, which cannot be settled just by showing a system performs cognitive functions ✓
• C. It proves that consciousness can only exist in biological brains
• D. It concerns the difficulty of building faster computer hardware

Why: Chalmers distinguished the 'easy problems' (explaining cognitive functions like memory and attention) from the hard problem of explaining why any of this is accompanied by felt experience. Even a fully functional AI would leave open whether it has subjective experience, which is central to whether it has a mind.

• A. Crystallized intelligence
• B. Emotional intelligence ✓
• C. Fluid intelligence
• D. Analytical reasoning

Why: Emotional intelligence describes the capacity to recognize, interpret, and regulate emotions in yourself and others. It is distinct from the abstract reasoning measured by traditional IQ tests, which is why it is considered a 'beyond smarts' ability.

• A. Verbal, numerical, and spatial
• B. Analytical, creative, and practical ✓
• C. Fluid, crystallized, and emotional
• D. Linguistic, logical, and musical

Why: Sternberg proposed that successful intelligence draws on analytical abilities (evaluating and comparing ideas), creative abilities (generating new ideas), and practical abilities (applying knowledge to everyday situations).

• A. Memorizing large amounts of factual information
• B. Solving abstract puzzles quickly under time pressure
• C. Adapting to, shaping, and selecting real-world environments to achieve goals ✓
• D. Scoring highly on standardized academic tests

Why: Practical intelligence involves applying knowledge to real-life situations, such as adapting to workplace demands, shaping one's surroundings, or choosing environments that suit one's strengths. It is often tacit, meaning it is learned through experience rather than taught explicitly.

• A. Knowing the largest number of facts about a subject
• B. Using knowledge and judgment to act well, especially considering others' interests and the limits of one's own knowledge ✓
• C. Processing information faster than others
• D. Being highly confident in one's own opinions

Why: Wisdom goes beyond accumulated knowledge to include sound judgment, ethical reasoning, awareness of uncertainty, and balancing one's own interests with those of others. Research by Baltes and others links wisdom to good advice-giving in complex life problems.

• A. IQ tests measure only memory, which has no relevance to work
• B. Factors such as emotional regulation, motivation, social skills, and practical judgment also strongly influence life outcomes ✓
• C. IQ scores fluctuate so much that they are meaningless
• D. People with high IQ always lack common sense

Why: Life success depends on many non-cognitive factors, including self-control, persistence, interpersonal skills, and practical know-how. While IQ predicts academic performance reasonably well, it explains only part of the variation in real-world achievement.

• A. Intelligence can be measured with standardized tests
• B. Intelligence is fixed at birth and cannot change ✓
• C. Intelligence includes multiple types of cognitive abilities
• D. Intelligence is related to problem-solving skills

Why: The belief that intelligence is entirely fixed at birth is a myth. While genetics play a role, intelligence test scores and cognitive abilities can change over time through education, experience, and environment.

• A. Yes, IQ is the sole predictor of life success
• B. No, IQ is only one of many factors, including motivation, emotional regulation, and opportunity ✓
• C. Yes, but only in academic settings
• D. No, because IQ tests do not measure anything meaningful

Why: IQ is a meaningful but partial predictor of outcomes. Motivation, self-discipline, emotional intelligence, social support, and opportunity all contribute substantially to success, so a high IQ alone is no guarantee.

• A. It is true that most people use only a small fraction of their brain
• B. It is a myth, because brain imaging shows that virtually all brain regions are active over the course of a day ✓
• C. It is true, but only for people with low intelligence
• D. It is a myth only for children

Why: Brain imaging studies consistently show activity across nearly all brain regions. Damage to even small areas typically causes noticeable deficits, which contradicts the idea that 90% of the brain is unused.

• A. Yes, the more someone knows, the more intelligent they are
• B. No, intelligence is the capacity to learn and reason, while knowledge is what has been acquired ✓
• C. Yes, because education is the only way to develop intelligence
• D. No, intelligence has nothing to do with thinking

Why: Intelligence refers to the ability to reason, learn, and adapt, whereas knowledge is accumulated information. A person can be highly knowledgeable yet poor at novel reasoning, and vice versa.

• A. School tasks often reward certain verbal and logical skills that overlap with traditional intelligence measures
• B. School performance also depends on work habits, persistence, and access to resources
• C. Intelligence is entirely separate from any cognitive ability used in learning ✓
• D. Grades and intelligence are correlated, which leads people to conflate them

Why: Option C is false: school success does draw on cognitive abilities that overlap with intelligence, which is why the two are correlated. The other options describe real reasons for the confusion, though school performance is not a pure measure of intelligence.