The 'Phonological Loop' is the part of short-term working memory that processes spoken and written language. In ADHD, this loop is weak and heavily dependent on dopamine to function.
When a text is dense, slow-paced, or boring, it fails to provide enough dopamine to keep the phonological loop powered. The connection between the visual cortex (seeing the words) and the semantic network (understanding the words) literally severs. This is 'Decoupling.'
To re-couple the networks, you must provide 'Cognitive Anchoring.' The ADHD brain has excess processing power that is looking for a target to destroy. You cannot simply ignore the excess power; you must intentionally spend it on a secondary, mindless task. Once the excess energy is anchored (e.g., by bouncing your leg or listening to white noise), the phonological loop is protected from interference and can finally decode the words on the page.
