I think this might be related to difficulty with time management. I get a lot more done if I know I only have 15 minutes than if I have an hour. And sometimes the quality of my work is actually better when I only have 15 minutes instead an hour. I think my brain needs the jump-start of having very structured time blocks.
Time warp and ADHD
About the Author: Stephanie Sarkis
Dr. Stephanie Sarkis is a National Certified Counselor (NCC), Licensed Mental Health Counselor (LMHC), and AMHCA Diplomate and Clinical Specialist in Child and Adolescent Counseling based in Tampa Bay, Florida, where she specializes in the treatment of ADD/ADHD. Dr. Sarkis conducts evaluations, testing, diagnosis, and counseling services. She also is a public speaker, consultant, coach, and is a facilitator in collaborative law.