We have been using TTalk in various forms now since 2013. 

While it has remained simple, both as a concept and in its use of technology, it remains a powerful educational tool. 

Here are some earlier sites and info pages about TTalk: 

There is a long history of trying to provide effective natural language processing in virtual patients. Our hybrid human-computer interface has remained cost-effective and scalable. 

Last modified: Saturday, 18 March 2023, 5:15 PM