Levels of Alertness

What is meant by the term - levels of alertness?
What are brainwaves?
What is meant by the terms - good days and bad days - regarding cognition?  (youth, middle age, elderly, etc.)

X-ref:

- Alvarez
- Berger
- Hill - Concentration - Accurate Thinking
- Silva
- Wild

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More Questions

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Does caffeine improve your cognitive abilities?

(Source:  E/a, q, other)

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- Communication
- Conversation
- Listening Skills

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Most Viewed Writers in ADHD/ADD and Life
The 10 writers with the most answer views in the last 30 days.

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998
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Charles Wild [Charles Thomas Wild]
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Congratulations, you're a Most Viewed Writer in the topic ADHD/ADD and Life! · 1h ago

(Source:  E/a - 05-13-2020)