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intelligence
the ability to learn from experience, solve problems, and use knowledge to adapt to new situations
general intelligence (g)
a general intelligence factor that, according to Spearman and others, underlies specific mental abilities and is therefore measured by every task on an intelligence test
fluid intelligence (GF)
aspects of innate intelligence, including reasoning abilities, memory, and speed of information processing; relatively independent of education and tends to decline as people age
crystallized intelligence (Gc)
our accumulated knowledge and verbal skills; tends to increase with age
cattell-horn-carrol (CHC) theory
crystalized (acquired), fluid (problem-solving & adaptability), other abilities (visual & auditory processing, memory, speed of processing, reaction time, quantitative skills, and reading-writing skills)
savant syndrome
a condition in which a person otherwise limited in mental ability has an exceptional specific skill, such as in computation or drawing
emotional intelligence
the ability to perceive, express, understand, and regulate emotions
intelligence test
a method for assessing an individual's mental aptitudes and comparing them with those of others, using numerical scores
achievement test
a test designed to assess what a person has learned
aptitude test
a test designed to predict a person's future performance; aptitude is the capacity to learn
mental age
a measure of intelligence test performance devised by Binet; the chronological age that most typically corresponds to a given level of performance
stanford-binet
the widely used American revision (by Terman at Stanford University) of Binet's original intelligence test.
intelligence quotient (IQ)
defined originally as the ratio of mental age (ma) to chronological age (ca) multiplied by 100 [thus, IQ = (ma/ca) x 100]. On contemporary intelligence tests, the average performance for a given age is assigned a score of 100.
wechsler
the most widely used intelligence test; contains verbal and performance (nonverbal) subtests
standardization
defining uniform testing procedures and meaningful scores by comparison with the performance of a pretested group
normal curve
the bell-shaped curve that describes the distribution of many physical and psychological attributes. Most scores fall near the average, and fewer and fewer scores lie near the extremes
realiabilty
the extent to which a test yields consistent results, as assessed by the consistency of scores on two halves of the test, on alternate forms of the test, or on retesting
validity
the ability of a test to measure what it is intended to measure
predictive validity
The success with which a test predicts the behavior it is designed to predict; it is assessed by computing the correlation between test scores and the criterion behavior.
charles spearman
creator of ‘g-factor’, or general intelligence, concept
john horn and raymond cattell
found that fluid intelligence (knowing how to do something) declines with old age while crystallized intelligence (knowing a fact) does not
howard gardner
devised theory of multiple intelligences: logical-mathematic, spatial, bodily-kinesthetic, intrapersonal, linguistic, musical, interpersonal, naturalistic
robert sternberg
devised the Triarchic Theory of Intelligence (academic problem-solving, practical, and creative)
heritability
the ability of a trait to be passed down from one generation to the next
flynn effect (james flynn)
Claims that people are getting "smarter" or at least getting better at taking standardized tests
psychometrics
the scientific study of the measurement of human abilities, attitudes, and traits
test-retest reliability
a method for determining the reliability of a test by comparing a test taker's scores on the same test taken on separate occasions
content validity
The degree to which the content of a test is representative of the domain it's supposed to cover.
intellectual disability
a condition of limited mental ability, indicated by an intelligence score of 70 or below and difficulty in adapting to the demands of life; varies from mild to profound
intellectually gifted
The 2 to 4 percent of the population who have IQ scores greater than 130.
factor analysis
a statistical procedure that identifies clusters of related items (called factors) on a test; used to identify different dimensions of performance that underlie a person's total score.