To maintain interest during long presentations, variety is a must! Studies prove that adult attention spans can be fairly short and presenters must consider this when planning their presentations. Using the same message delivery style beyond 15–20 minutes may cause your audience to wander mentally. Plan shifts in delivery mode to avoid audience boredom and discourage "mental vacations". Intersperse lecture with Q&A sessions, brainstorming discussions, role-playing, demonstrations, multimedia segments or storytelling. Both you and the audience will find the variety delightful and participants will thank you for keeping your presentation delivery effective and interesting.

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