A student with adhd who has trouble waiting his turn, resisting distractions, delaying immediate gratification, or interrupting a faulty line of thinking is having problems with:
behavior inhibition refers to the tendency that people have to withdraw ourself from the situation that seem 'unfamiliar' for us. In the scenario above, that student cannot delay his/her gratification because that student is not familiar with the reward that might come because of the delayed gratification.