On Apr 5, 2014 8:09 PM, "Jeff Levy" <jeff@o10s.com> wrote:
>
>... synchronous communication facilitates much more
> meaningful discussion than does asynchronous posting.  

Have you consulted authors of topical peer reviewed literature reviews to ask their opinion on that question? It depends on the complexity of the subject of instruction, whether motor skills are involved or it's only cerebral, the extent of certainty in the subject matter area, and the extent to which the subject matter is not emotionally charged.