Rarely does the PF look across at the switching while the PNF does his own thing of challenging and responding to himself
This is all over the B737 checklist. The initial scan by the F/O of the overhead panel is covered in the “Pre Flight Checklist” however its the F/O that looked at a switch in his flow, then challenged the switch in the checklist, then responded to the challenge, usually while the skipper is having a coffee.....
I don’t know the logic behind it, but id love to know why I’m checking something that I have already checked and the captain hasn’t looked at. (sometimes
)
Still, KISS is the best way forward along with airmanship, some people seem to forget that.