Hmm, color me confused... I am not a pilot but heard this from pilot acquaintances and thought I understood the physics. I wonder if we're still talking about different time intervals though? I'm talking about the immediate effect in situations like buffeting/turbulence, in milliseconds before the pilot's nervous system can even react.
Think of the pilot and plane being in level flight and the nose suddenly pitches up. In that moment, the seat jerks away from the pilot's back and the instrument panel and windshield jerk towards the pilot. In that moment is where I believe there would be some negative input to the yoke. The plane is pitching up but the pilot is still level.
I understand that, eventually, the pilot will also pitch up, due to pressure from the seat bottom and tension from straps. In the longer time scale where that happens, the pilot's nervous system also allows them to intentionally modify their control inputs.
Think of the pilot and plane being in level flight and the nose suddenly pitches up. In that moment, the seat jerks away from the pilot's back and the instrument panel and windshield jerk towards the pilot. In that moment is where I believe there would be some negative input to the yoke. The plane is pitching up but the pilot is still level.
I understand that, eventually, the pilot will also pitch up, due to pressure from the seat bottom and tension from straps. In the longer time scale where that happens, the pilot's nervous system also allows them to intentionally modify their control inputs.