cognitive ability the capacity to reason, remember, understand, solve problems, and make decisions intelligence those attributes that center around skill at information processing, problem solving, and adapting to new or changing environments IQ test a test designed to measure intelligence on an objective, standardized scale mental age age corresponding to the average individual's performance on an intelligence test chronological age age as measured in years from date of birth intelligence quotient an index of intelligence that reflects the degree to which a person's score on an intelligence test deviates from the average score of others in the same age group validity the degree to which test scores are interpreted correctly and used appropriately content validity the degree to which the content of a test is a fair and representative sample of what the test is supposed to measure split half ex. odds and evens, "splitting the test" pygmalion effect exceptional progress by a student as a result of high teacher expectations for that student, also expectancy effect standardization defining meaningful scores by comparison with the performance of a pretested standardization group psychometric approach a way of studying intelligence that emphasizes analysis of the products of intelligence, especially scores on intelligence tests LL Thurstone found 7 independent primary mental abilities: numerical ability, reasoning, verbal fluency, spatial visualization, perceptual ability, memory, and verbal comprehension Raymond Cattell agreed with Spearman, but his own factor analyses suggested that there are two kinds of g, which he labeled fluid and crystallized fluid intelligence the basic power of reasoning and problem solving crystallized intelligence the specific knowledge gained as a result of applying fluid intelligence information processing approach an approach to the study of intelligence developed by Earl Hunt that focuses on mental operations, such as attention and memory, that underlie intelligent behavior triarchic theory of intelligence Robert Sternberg's theory that describes intelligence as having analytic, creative, and practical dimensions multiple intelligences 8 semi-independent kinds of intelligence postulated by Howard Gardner; linguistic, logical-mathematical, spatial, musical, bodykinesthetic, intrapersonal, interpersonal, naturalistic cross sectional study compares data collected at the same point in time from people of different ages longitudinal study a group of people is repeatedly tested as they grow older creativity the capacity to produce new, high-quality ideas or products divergent thinking the ability to think along many alternative paths to generate many different solutions to a problem convergent thinking the ability to apply logic and knowledge to narrow down the number of possible solutions to a problem or perform some other complex cognitive task learning disability people who show a significant discrepancy between their measured intelligence and their academic performance dyslexia find it difficult to understand the meaning of what they read, or in sounding out and identifying written words (trouble with reading) Project Head Start a government-funded program that is designed to provide children from lowincome families the opportunity to acquire the skills and experiences important for school success culture fair tests tests of intelligence that are designed to be free of cultural bias