- selective optimization with compensation model of aging (gains and losses) - ecological model of aging (interaction between person and environment results in adaptation)
- experimental - quasi-experimental - descriptive - multifactor - meta-analytic (synthesizes summary statistics from variety of studies) - mega-analytic (combines raw data from multiple studies with identical measures)
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programmed theories of biological aging
- time clock theory (life span determined by genetic blueprint) - immune theory (immune system programmed to maintain efficiency for limited time then decline) - evolutionary theory (members of society are programmed to live long enough to birth and raise children)
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stochastic theories of biological aging
- error theory (error occurs at cellular level, production of faulty molecules) - wear and tear theory (begin life with fixed amount of energy, expend energy earlier = aging begins early) - stress theory (longer for regulatory systems to return to normal level from stress, prolonged exposure to stress hormones)
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magnetic resonance imaging (MRI)
provides an image of people's brains with structural and functional information
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scaffolding theory of aging and cognition
- throughout life, the brain adapts to neural challenges by building alternative neural circuitry, or scaffolds - scaffolds can offset age-related decline in functioning
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cognitive reserve
notion of cognitive reserve arises from a number of findings showing that some individuals have certain symptoms in their brain that are like those with Alzheimer's but don't show any of the cognitive declines associated with A.D.
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spearman's g
general ability that relates to intelligence
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thurstone's primary mental abilities
- verbal meaning - number (arithmetic) - word fluency - inductive reasoning - spatial orientation - memory - perceptual speed
- phase 1: mapping an inevitable age-related decline in intelligence - phase 2: identifying the components of intelligence that remain stable and those that decline - phase 3: focus on intraindividual variability - phase 4: interest in new ways to define and measure intelligence
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flynn effect
refers to the fact that a sample of 60-year-olds today will score higher than a sample of 60-year-olds who took the same test in 1990
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classic aging pattern
- verbal abilities remain stable with age - nonverbal abilities decline with age
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mental activity and intellectual functioning hypotheses
- disuse hypothesis of cognitive aging: skills and abilities get rusty when not used on a regular basis - engagement hypothesis: novel and challenging tasks and mental exercises prevent decline in intellectual functioning
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encapsulation model
with increasing age, knowledge becomes more channeled within specific domains