I'm reading Fact and Fiction in Psychology by Hans Eysenck and he says that stimulants like caffeine and amphetamine-based drugs (Ritalin, etc.) make people more introverted while depressants (like alcohol) make people more extraverted and ties this in with his idea that introverts have a low tolerance to sensory stimulation while extraverts have a high tolerance.
This is pretty old research, but Eysenck's ideas for the neurological basis of Extaversion and Introversion is well accepted nowadays.
This would imply that people with ADHD are extroverted by definition
This is pretty old research, but Eysenck's ideas for the neurological basis of Extaversion and Introversion is well accepted nowadays.
This would imply that people with ADHD are extroverted by definition