Free-text input vs menu selection: exploring the difference with a tutorial dialogue system. Jenny Mcdonald author Alistair Knott author Richard Zeng author 2012-12 text Proceedings of the Australasian Language Technology Association Workshop 2012 Paul Cook editor Scott Nowson editor Dunedin, New Zealand conference publication mcdonald-etal-2012-free https://aclanthology.org/U12-1013/ 2012-12 97 105