Prepare your presentation a couple of days ahead, check it the next day and have somebody else look at it. You will prevent “silly” mistakes and uncertainty.
Determine the questions you want to ask and set for each question a goal: What do you want to measure? Does the question reach its goal? Do all the questions reach the goal of the presentation?
Explain the functionality of the IVS and if desired the use of the keypads to your audience.
Ask a unimportant test question, your audience will get acquainted with the system.
Make sure your reference questions are relevant and effective ( What is your age? What is your line of business? What is your position? ) if you want to make crossings.
If you want to discuss the answers or crossings durings a presentation, only do so if you had the opportunity to interpret them in advance.
Walk through your presentation using “test voting”, this way you will make sure all the technical settings are correct.
Make sure the phrasing of a question is sort, clear and open for one explication. Split if necessary the question.