The moment you sit down to do something important, your mind fills with everything else. That's not coincidence.
What's Actually Happening
In the 1920s, Soviet psychologist Bluma Zeigarnik discovered that the brain treats unfinished tasks as open loops - actively holding them in working memory and interrupting unrelated thinking until they're resolved. The more unfinished things you're carrying (unanswered messages, pending decisions, half-formed ideas), the more your brain interrupts during deep work. It's not wandering - it's scanning.
The second mechanism is emotional. Research by Timothy Pychyl, including *Solving the Procrastination Puzzle*, shows that procrastination functions primarily as emotional regulation - the discomfort before a hard task is real neurological resistance, and scrolling genuinely relieves it in the short term. The brain learns: escape works. The cycle reinforces itself.
Stress -> overthinking -> escape -> guilt -> repeat isn't a character flaw. It's a trained response.