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These studies suggest that IQ changes with age, showing stability from childhood to old age, increasing heritability, and complex interactions with cognitive abilities and health factors.
20 papers analyzed
The relationship between IQ and age has been a subject of extensive research, focusing on how intelligence changes over the lifespan and the factors influencing these changes. This synthesis examines the stability of IQ, the heritability of IQ with age, and the impact of various factors such as health, education, and lifestyle on cognitive aging.
Stability of IQ Over the Lifespan:
Heritability of IQ:
Impact of Physical Health:
Cognitive Performance and Aging:
Generational Changes in IQ:
Early Life IQ and Later Life Outcomes:
Smoking and Cognitive Decline:
Research indicates that IQ remains relatively stable throughout life, with heritability increasing and environmental influences decreasing with age. Physical health plays a crucial role in mediating the decline in fluid intelligence, while crystallized intelligence remains largely unaffected. Generational shifts and lifestyle factors such as smoking also contribute to cognitive aging. Early life intelligence has long-term implications, influencing subjective age and cognitive health in later life.
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