they hope to be the next amy cuddy. >> amy cuddy: we're really fascinated with body language. >> rosewas a largely unknown psychology professor at harvard until she took the ted stage in 2012. >> cuddy: so what is your body language communicating to me, what's mine communicating to you? >> rose: cuddy's talk was about her research into nonverbal communication, but it was her personal story that captured the imagination of the audience. >> cuddy: when i was 19, i was in a really bad car accident. i was thrown out of a car, and i woke up in a head injury rehab ward, and i learned that my i.q. had dropped by two standard deviations. >> rose: she agonized about revealing she had suffered a traumatic brain injury in that car accident. >> cuddy: i felt deep ambivalence, and also "what have i done?" >> rose: ambivalence? >> cuddy: yes, have i changed my life in a way that i.. that i'll regret? will people be judging me? will my colleagues think i'm stupid? the head injury story was really, really personal, and it was something that i had mostly kept locked away. >> rose: this is the most wat