8 papers analyzed
These studies suggest that normal IQ levels are generally stable across age, with some decline in Performance IQ and Full Scale IQ from age 20 to 74, while Verbal IQ remains stable.
Intelligence Quotient (IQ) is a measure of cognitive abilities relative to the population. Understanding how IQ levels vary with age is crucial for educational planning, psychological assessment, and cognitive health monitoring. This synthesis examines the relationship between age and IQ, drawing on findings from multiple research studies.
IQ Stability and Age:
Age-Related Cognitive Decline:
Heritability of IQ:
Impact of High IQ in Older Adults:
IQ and Mortality:
IQ and Cognitive Timing Tasks:
IQ levels exhibit a degree of stability across the lifespan, with minor fluctuations. Verbal IQ remains relatively constant, while Performance and Full Scale IQ decline with age. The heritability of IQ increases with age, and higher childhood IQ is linked to lower mortality risk. These insights highlight the importance of considering age-related changes in cognitive assessments and the potential for high IQ to serve as a protective factor against cognitive decline and mortality.
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