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These studies suggest that IQ can change over time, with variations depending on age, mental health conditions, and specific cognitive abilities.
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The question of whether an individual's intelligence quotient (IQ) can change over time has been a topic of considerable research. IQ is often viewed as a stable measure of cognitive ability, but recent studies suggest that it may be more dynamic than previously thought. This synthesis examines the evidence from multiple research papers to understand the extent and nature of IQ changes over time.
IQ Changes in Adolescence:
Measurement Reliability and Naturalistic Changes:
IQ Changes in Schizophrenia Patients and Siblings:
Age-Related Changes in IQ:
The research indicates that IQ is not entirely fixed and can change over time due to various factors such as brain development, mental health conditions, and aging. While most individuals experience negligible changes, a significant minority can see marked and real changes in their IQ. These findings challenge the traditional view of IQ stability and suggest that intellectual capacity can be more fluid, especially during adolescence and in specific populations.
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