I noticed that the speakers sometimes make mistakes when they talk. Didn’t they rehearse their lines?
All of the speakers and signers used in the series were asked to prepare or think about the following things to talk about: a brief introduction, a short personal story, how to do something, and a short lecture. By choosing these topics, the type of discourse that is used becomes slightly more complex in each succeeding presentation. The speakers did not write out their remarks and did not rehearse them. I feel strongly that effective practice material must focus on naturally occurring discourse, complete with mistakes, repetitions, and fillers because this is the type of discourse interpreters will encounter in the real world.