Neurodivergent glossary
Decision Fatigue
The deteriorating quality of decisions after a long session of decision-making—amplified in ADHD brains that already struggle with prioritization.
What it means
Decision fatigue is the well-documented phenomenon where the quality of your decisions degrades after making many of them. Every choice—from what to eat for breakfast to how to respond to an email—draws from a finite cognitive reserve. When that reserve runs low, you either make poor choices or stop making choices altogether.
For neurodivergent people, especially those with ADHD, decision fatigue can hit faster and harder. When your brain already struggles with prioritization and evaluation, every decision costs more cognitive effort than it would for someone whose executive function handles it automatically. A neurotypical person might breeze through 20 small decisions before lunch; an ADHD brain might be depleted after five.
This is why many neurodivergent people develop systems to reduce daily decisions: meal planning, capsule wardrobes, routines, and default choices. It's not rigidity—it's resource management.
In practice
What this can look like
- By mid-afternoon, you can't decide what to have for dinner. Not because you're not hungry, but because you've already made so many decisions today that your brain has stopped cooperating with new ones.
- You're shopping for a new phone. After comparing five models across eight features, you either buy the first one you see or leave the store with nothing—both results of a decision-making system that's run out of fuel.
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