Hi Gillian,
Thanks for your reply. The thing is that I haven't yet seen any "formal" or academic studies on this. For example, some blogs identify a “ Compression ratio” : What would the length of the course be if it were online vs. classroom based?
“There's been a lot of research on this, and answers vary anywhere from 20% to 80% of the original length, but there's general agreement that an average compression ratio is typically about 50%, or a four hour course in the classroom should take the student 2 hours to complete online”.
Thanks