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Brain Fog Self-Assessment Questionnaire

Think back over the past month. How often have you experienced the following situations?

(0 = Never, 1 = Occasionally, 2 = Often, 3 = Almost daily)

1. I find it hard to concentrate, even on simple tasks.

2. After extended mental effort, I often experience mental fogginess or slowed thinking.

3. Even after a full night’s sleep, my brain still feels heavy or “cloudy.”

4. Sometimes, even in familiar places, I get confused about where I’m going or why I came there.

5. When speaking or writing, I often struggle to find the right words.

6. I need to reread things or have people repeat themselves before I understand them.

7. I struggle to switch between tasks, and often forget what I was doing before.

8. I feel mentally exhausted—like my brain is tired and I can’t plan or think clearly.

9. Brain fog has interfered with my work, daily activities, or decision-making.

10. These issues have made me feel stressed, anxious, or socially withdrawn.

Source Acknowledgement:

Some questions in this quiz are adapted from the following validated instruments:

  • MFI-20: Multidimensional Fatigue Inventory
  • CFQ: Cognitive Failures Questionnaire
  • PROMIS Cognitive Function (PROMIS-CF) v2.0

This assessment is for informational purposes only and does not constitute a medical diagnosis. Please consult a healthcare professional if symptoms persist.

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