fMRI studies show greater RIGHT hemisphere activation for sentences with definite articles than sentences with indefinite articles.

Question

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This is true. Research has shown that sentences with definite articles (e.g. "the") typically involve more mental processing and greater activation in the right hemisphere of the brain, compared to sentences with indefinite articles (e.g. "a"). This may be due to the additional semantic information conveyed by definite articles.

FMRI Studies Show Greater RIGHT Hemisphere Activation for Sentences with Definite