What is the feedback loop?
The feedback loop comes from the fact that the more communicative(intelligent, smart etc…) the chatbot is, the more likely the user will be at responding and keeping the topic on track. Likewise if the the chatbot is completly ignorant or redicilous the user will more often than not change the subject. This means that, technically speaking, one can calculate how well the chatbot performs, by comparing the chatbots words and sentences to those of the user. The more similar they are throughout the conversation, the more intelligent the chatbot is – this depends on the user as well naturally.
