Been reading stuff about how things happen in the brain when you converse, like this article: https://files.nyu.edu/sd1083/public/Dikker_BL_2012_website.pdf and this one: http://www.learning-mind.com/your-brain-is-a-prediction-machine-it-predicts-what-your-interlocutor-is-going-to-say/
There is quite a bit of research going on about this. It makes sense of course, but I myself had never thought about it.
To me, this stuff validates the SSi method, in particular the practice sessions, and it emphasises the need to get as much conversational practice as possible. But we knew that already…