Cognitive load

Cognitive load refers to the amount of mental effort required to process information and carry out tasks. In ADHD, the cognitive load of executive tasks — planning, inhibition, emotional regulation — is significantly higher than in neurotypical brains, because these functions don't happen automatically but require conscious effort.

This has practical implications: a person with ADHD may be fully capable of completing a task but lack the 'mental space' available when juggling multiple demands at once. What looks like an inability to do something simple is often cognitive-load saturation.

Reducing cognitive load is a core principle behind many ADHD adaptations: checklists (fewer items to memorize), simple organizational systems (fewer decisions), automated routines (less conscious planning), and less stimulating environments (less filtering required).