Here's her TED talk from 2012 (19 min.):
http://www.ted.com/talks/susan_cain_the_power_of_introverts....
If you like that, you might enjoy her book on introverts:
http://www.amazon.com/Quiet-Power-Introverts-World-Talking/d...
(non-affil link) http://www.amazon.com/Quiet-Power-Introverts-World-Talking/d...
Introversion and extroversion have nothing to do with shyness or how outgoing you are. It has to do with where you derive energy and I disagree with the author of the linked article that introverts just need to practice social interaction. As the book points out, introversion and extroversion can be determined very early in life, she mentions a study where infants who were more reactive to stimulus turned out to be introverts and infants who were chill turned out to be extroverts:
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“The four-month-olds who thrashed their arms like punk rockers did so not because they were extroverts in the making, but because their little bodies reacted strongly—they were “high-reactive”—to new sights, sounds, and smells,” Cain writes. “The quiet infants were silent not because they were future introverts—just the opposite—but because they had nervous systems that were unmoved by novelty.” These “high-reactive” babies grow up to be children who need a lot of time to decompress after school, need time alone to be creative and explore. They are introverts, not anti-social, Cain explains. There is a big difference.
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