> Amphetamines narrow your focus of attention, while psychdelics widen it. And that's exactly why this study is bogus. Here are the two tests which they used t

> Amphetamines narrow your focus of attention, while psychdelics widen it. And that's exactly why this study is bogus. Here are the two tests which they used to "measure" cognitive ability. See anything wrong here? https://en.wikipedia.org/wiki/Digit_symbol_substitution_test https://en.wikipedia.org/wiki/Digit_symbol_substitution_test https://en.wikipedia.org/wiki/N-back https://en.wikipedia.org/wiki/N-back