Well that's a tough one! I was thinking reputation could be a way to assess self determined and self directed learning. Wouldn't being seen as an expert by your peers and existing experts in your chosen field be a good assessment of learning?
I'm in the midst of writing a blog post about how I applied my Agile Learner Design (ALD) methodology to all my learning with Open Badges... other than being a long time advocate for open accreditation I had no exposure to Mozilla Open Badges until early 2012. And by the end of 2012 I was asked to facilitate a workshop with BCCampus / SCoPE on the subject. Essentially my peers assessed me as an expert to a subject I had little knowledge of 9 months previous and with a focused and methodological approach (ALD) I was able to develop an expertise...
But isn't this similar to publishing in peer reviewed journals, speaking at conferences, etc... as a way to be known as an expert?
All good!