3 Simple Rules For Exercising with ADHD What is Executive Function? One of the differences people with ADHD often have is a debilitating issue with executive function. I first became aware of my own ADHD when I noticed the difference between my son and my daughter. I could ask my daughter to clean her room and she could handle it without being told that cleaning her room involved making her bed, putting away her clothes, picking toys off the floor, and emptying the trash can.