First up I must say that I am excited to find this group. I first came across the concept of emergent (and transformative) learning while researching for my Ph.D thesis. I have progressed my thinking and experience a long way since then but have found very few thinkers who really understood the question of emergent learning (much less understood the answer).
Nevertheless, I am responding to this point so had better move along.
One of the issues I find is that so much of learning has attempts made to measure and evaluate it by the training/teaching which went into it. Unlike measuring the speed of a car by how much pressure is placed on the accelerator, learning cannot be measured by how much or what is taught. It is a phenomenon which occurs within a context and environment, much - most - of which cannot be influenced by the teacher, or even by the learner. So attempting to measure learning by what a teacher or trainer does is fraught.
Emergent and transformative (if it is to be real learning and not simply responding to a stimulus) learning finds its roots in the theories behind complexity and chaos. It is these concepts which, when underpinned by the studies into neuroplasticity, gives us a clue as to how the environment can be shaped in order to generate emergent learning.
If the learning is truly emergent and transformative it cannot be by definition be measured and evaluated. Therefore, it is my contention - drawn from a lot of years actual experience - that what should be assessed is not the learning but the learner's reaction to the environment and how his/her knowledge is shaped as a response.