ADHD and Procrastination

There are some questions about how ADHD relates to procrastination specifically. What is it about ADHD that makes it a more prevalent problem with people with ADHD? People who are anxious may procrastinate, particularly if there's performance anxiety. There seems to be a constitutional difference in the amount of dopamine available in the reward centers in the prefrontal cortex which make it more difficult to shift from being off-task to on-task.