Psychological flow is kind of like going on autopilot, or being completely immersed in an activity, and is also related to high performance levels. I was reading about flow in music, but it reminded me of language learning and the input hypothesis: feeling awkward, self-conscious, or even bored while learning a language raises an affective filter and inhibits learning effectiveness.
Is there any research demonstrating the presence of such a mental state in the context of L2 communication?
Also, is there research to support a connection between flow and language competency? Can such a state of mind be taught/learned?