Cuddy gives a simple, biological explanation for this. She says that striking some poses releases particular chemicals in the brain. For low-power poses, these chemicals make people believe they are powerless. Feeling powerless, they often do not cope well with stress, and they are less positive. Conversely, Cuddy found that high-power poses release other chemicals in the brain. These tell people that they are powerful, so they then feel confident. Interestingly, Cuddy found that it didn't matter what qualifications a candidate had, or even what he or she actually said in the interview. "It's not about the content of the speech," explains Cuddy, "It's about the presence that they're bringing to the speech."