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Module 39
UNIT 5 The Dynamics of Intelligence
| Term | Definition |
|---|---|
| cohort | a group of people sharing a common characteristic, such as from a given time period. |
| crystallized intelligence | our accumulated knowledge and verbal skills; tends to increase with age. |
| fluid intelligence | our ability to reason speedily and abstractly; tends to decrease with age, especially during late adulthood. |
| cross-sectional study | research that compares people of different ages at the same point in time. |
| longitudinal study | research that follows and retests the same people over time. |
| intellectual disability | a condition of limited mental ability, indicated by an intelligence test score of 70 or below and difficulty adapting to the demands of life. |
| Down syndrome | a condition of mild to severe intellectual disability and associated physical disorders caused by an extra copy of chromosome 21. |