Session chairs need to prepare in advance of their session. They should read the abstracts of their speakers in advance so as to have some questions pre-prepared to ask if there are no questions from audience. They should be in the room to meet the speakers 10 min before the start of their session. The technical support volunteers will have prepared all the speaker slides on the computer used for the presentations and will notify the Chair if a speaker is unable to present. Chairs remind speakers how much time they have and give them a 2 min warning before their time is up. If a speaker goes over time thank them and invite the next speaker up. If a speaker allows time for questions the Chair should ask the audience if anybody has a short question.
If an audience member starts their own speech interrupt them and ask for the question. Remind the presenter to give short answers to questions. If they start rambling on interrupt them and ask if they would like to answer another question and if not the next speaker is asked to begin.