Several studies indicate that IQ test scores are fixed, and can't be significantly modified by the environment

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While IQ test scores do have some genetic basis, they are also influenced by environmental factors such as education, nutrition, and opportunities for intellectual stimulation. Studies have shown that interventions such as early childhood education and enrichment programs can lead to significant improvements in IQ test scores. Therefore, IQ test scores are not entirely fixed and can be modified to some extent by the environment.

Several Studies Indicate That IQ Test Scores Are Fixed, and Can't