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The article discusses people who may have a trait Dr Elaine Aron calls "highly sensitive". She has been researching the highly sensitive since 1991.

She says the trait is normal. It is found in 15 to 20% of the population. She writes:

"While being easily overstimulated and aware of subtle little things may be what most parents notice first about their Highly Sensitive Child, depth of processing is really the underlying trait."

See her 2014 summary of scientific research on highly sensitive children here: http://hsperson.com/pdf/Authors_note_HSC.pdf

For more information see Dr Aron's website here: http://hsperson.com/