Erratic working memory and a faulty attention system (impaired executive functions) leads to procrastination. Think of working memory like RAM in a computer; without enough RAM, the brain forgets what it was working on, and moves onto the next task at hand.
People with ADHD also have the uncanny propensity to forget or suppress their goals or important activities they need to complete and instead spend time on trivial tasks, even when they know the consequences of failure in these more critical tasks.
Yet, people with ADHD also "benefit" from procrastination, though probably in somewhat unhealthy ways. When they reach a point of "do-or-die," then a couple of things happen: cortisol (stress response and stress hormone) and dopamine (neurotransmitter of attention system) activate in the body. Suddenly, the frontal cortex is "turned on" and RAM and executive functions begin to work normally. Then these individuals are able to focus their effort and attention on the task at hand.
Therefore, as painful as procrastination can be, people with ADHD still feel they are able to pull a rabbit out of the hat at the last minute, which continues this cycle of procrastination.
Source: The Disorganized Mind, Nancy A. Ratey, 2008
Daniel H. Lee
This blog will be dedicated to sharing in three areas: happenings in my classroom and school; analysis and distillation of other educators' wealth of knowledge in various texts; insights from other disciplines and areas of expertise that relate and connect with educational practices.