alt Hacker News> Professional public speakers...
Maybe some do, but I've never needed it. Often I actually find public speaking easier than small groups. In a small group my brain is trying to "model" what each person is thinking about my talk, as the groups get larger that becomes impossible and I tend to relax and let go. I also find the energy in a larger setting is a useful feedback mechanism. I might toss a small joke out and see if the audience is engaged, or I will ask a question and get a show of hands. The more I engage the calmer I feel and the more enjoyable the experience is for me and my audience.
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I agree regarding audience size and add the factor or preparation - no way am I going to speak to a large audience without solid prep. That helps me a ton, feeling prepared and rehearsed.
That's interesting. My brain does the same in terms of attempting to simulate that model of the people, but when it becomes impossible to run the algorithm (too large of a group), instead of just giving up, my brain goes into panic mode. I have found propranolol helps me with many of the physical symptoms that would otherwise dominate.