Abstract: This is a study of the dynamics of delayed inhibition in children of different ages (9,12 and 15-year-olds). The experimental results indicate: 1) The younger the child, the longer the pre-reactioned phase and the more difficult the development of delayed inhibition; 2) The younger the child, the stronger the after-effect inhibition and the longer the duration of after-effect inhibition; 3) The functional role of the second signal system in the formation of delayed conditioned reflex increases with the age.

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