I think the 'human behaviour experts' were test pilots. They design, test and approve all sorts of things with their own (very poor) concept of what constitutes a typical line pilot in mind as they do so.
Incidentally, during certification the 787 primary test pilot got surprised by the same A/T behaviour that tripped up the Asiana 214 crew. FAA then required explanatory notes to be added to the 787 manuals as part of its certification. But the same notes were not added back to the 777's.