The very fact that speaking in public is an auditory-based medium of communication demonstrates the value of including some visual features. As 70% of humans primarily communicate visually (with the eyes), a purely auditory (with the ears) type of communication (as with speaking) is insufficient.
As the speaker you no doubt have experience or knowledge that your audience lacks. If there is one-smart ace in the audience who knows more about the subject than you do then they are probably in a minority of one, so relax.
Getting your timing wrong in a speech is not an issue that concerns the clock. It rather has to do with poor planning throughout. Why is it advisable to carefully stay within your timing limits as a speaker?
Far worse than having a speech with no main points at all is to have an outline where you have chosen your key ideas unwisely. Your main points should be highlighted throughout your presentation as peaks in your talk. The audience should be able to see them from afar off as you build to them. …
Unlike children who will learn simply for the sake of learning itself, adults need to see benefits before they can readily pick up new information or skills.
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