PSYC 362 Lecture Notes - Lecture 5: Fluid And Crystallized Intelligence, Pragmatics, Longitudinal Study
Document Summary
What is intelligence? the aggregate or global capacity of the individual to act purposefully, to think rationally and to deal effectively with one"s environment. Most common: wechsler intelligence scale for adults (wais: verbal, performance. One on one interview with props ,timing how long it takes you to answer question. Longitudinal stability until later life (one group over time) Cross-sectional designs = cohort effect related jobs , test experience. Successive cohort have higher education , better healthy, thought . Multiple cross-sectional and longitudinal designs within one study. Separates cohort & time-of-measurement effects from real developmental patterns. Change in 5 primary mental abilities (look at slides) By 80 most adults show significant decline, but only in one or two areas: fluid abilities decline earlier than crystallized abilities. Summary : cross-sectional studies show declines in intelligence; longitudinal studies show stability, crystallized (verbal) iq appears throughout adulthood; fluid (non-verbal) iq declines.
