What we learn in school
In formal learning situations (school, training) we learn that we are not in charge of our own learning. External control replaces a child's natural desire to learn. We carry this school learning into our adult lives and most structured learning situations. Put someone in an ordinary training situation and they often tune out or get hostile.
But much informal learning continues in adulthood. Allen Tough (1971) at the Ontario Institute found that in his sample of 66 adults, each typically had 8 projects for learning that they spent 81-104 hours on in a 6 month period. So it is not that adults stop learning or stop wanting to learn. I think a formal learning situation triggers old expectations that they are not in charge of their learning. I found that when we tried to have staff members direct their own staff development (through learning contracts) many had no idea how to make choices.
Brockett and Heimstra, also at the Ontario Institute, make a distinction between self-directed learning (facilitated by an educator) and learner self-direction in which the learner takes responsibility for the learning. What would need to happen for learner self-direction to become the norm in schools and businesses?