Call it the result of cultural conditioning or some deeper instinctual response, but research published in the journal Social Psychological and Personality Science suggests that merely lowering the pitch of your voice when speaking can lead to a greater sense of empowerment and gains in the ability to think abstractly. Oddly enough the effect measured was not on the audience, but on the speakers themselves. There’s a wealth of literature linking a deep voice to a greater sense of confidence in the speaker from an audience, but this study indicates that speakers themselves are affected subconsciously by the pitch of their own voices.
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