What are some criteria in diagnosing an individual with ADHD? Those who are unable to not focus as much on the small details of certain things and tend to make careless mistakes through daily activities. These individuals have a hard time keeping their attention on certain tasks or activities and when spoken to, they would have trouble understanding the speaker for the most part because their mind is on something else. This brings us to the individual unable to follow directions very well and therefore, would generally not able to accomplish work that needs to be done. Individuals who are diagnosed with ADHD also have trouble keeping up with things that need to be done, and it could be something simple as a list of chores to do. They try to stay away from activities that require long thinking and an example could be writing essays, doing math homework, etc. Since they are unable to organize and carry out tasks very well, they are more prone to forgetting what needs to be done and are easily distracted with various thoughts.