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Re:New Study Finds Performance-Enhancing Drugs for Chess by matt4077 on Thursday January 26, 2017 @11:54PM (#13497811)
No, I'm pretty sure being "hyper-focused" is the opposite of ADHD, considering that "focus" and "attention" are synonyms and "deficit" and "hyper" are opposites,

And the effect of amphetamines is improved focus (as well as slight euphoria and wakefulness) BUT one possible problem is that people lose control of what they focus on and tend to get lost in the details. I. e. you start out writing a letter and end up reading about 18th century calligraphy.

Re:New Study Finds Performance-Enhancing Drugs for Chess by dood on Friday January 27, 2017 @03:53AM (#13498533)
> No, I'm pretty sure being "hyper-focused" is the opposite of ADHD

This is a common misconception: https://en.wikipedia.org/wiki/Hyperfocus

"It is typical for individuals with ADHD to say they 1), cannot focus on boring things and 2), can only focus on stimulating things, and that focus is often extreme. Thus it is both a concentration deficit and over-concentration, or generically: "hyperfocus." More concisely, some types of ADHD are a difficulty in directing one's attention, not a lack of attention"