Brain scans, such as positron emission tomography (PET), reveal that semantic tasks (which process meaning) produce much more activation in the left inferior prefrontal cortex than perceptual tasks (which process visual features).

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In memory research, performing a semantic task (such as categorizing a noun as living or non-living) results in significantly better subsequent recall of the information than performing a perceptual task (such as searching for a specific letter in a word).

Recall of Semantic vs. Perceptual Tasks

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

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