Clandestino:
Originally Posted by Retired F4
the PF might lack the demand (control position) and has to rely on the effect (instruments) only. The closed loop system is not available to him.
I suppose you meant PNF. Why should be there control loop for him?
He is not supposed to be controlling the aeroplane, but monitoring her - aeroplane, not the other pilot.
Wrong answer, amigo.
I used to teach this stuff (to some seriously ego endowed pilots) and had it taught to me (as a seriously ego endowed pilot) while in the Navy. We learned a lot of our CRM from commercial aviation, specifically the airlines.
CRM 101: if the other pilot is AFU, you have to recognize that and act to make the situation better. This may include actions like taking the controls in those {hopefully} rare occasions that it is necessary. Usually you help him get back into the problem and get back to flying right.
You can't do that unless you assess how well the other pilot is doing if things are not going well, or if he isn't flying right.
I am pretty sure that you know better than that off hand remark you made, in bold, since you do multi-place aricraft flying for a living, and IIRC, are a Captain.