Abstract: This experiment studies the laterality difference in the execution ofthe higher-order cognitive task categorization, utilizing Chinese wordsand pictures as stimuli materials. The subjects were called upon tojudge whether the two stimuli simultaneously presented in the right orleft visual field came under the same category. The results suggestedthat: (1) when using the nonverbal pictures as stimuli materials, thesuperiority of the right hemisphere in higher-order cognitive tasks wasevident, and when using the Chinese words as stimuli materials, thesuperiority of the left hemisphere in higher-order cognitive tasks wasevident; (2) the two hemispheres had no laterality difference in the"same" judgment and the "different" judgment modes.

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