As an engineer supporting researchers I ran into a peculiar problem. If I suggested an idea they often HAD to ignore it, because they couldn't claim it as their own. Especially the grad students who were trying to get a PhD by coming up with a unique idea of their own, but also the profs because it would be an admission that they "the experts" didn't understand what they were doing. So I had to lead them to come roun…
This paragraph is a great insight - knowing how someone else is going to receive your (as you perceive it) constructive criticism cuts down miles to the destination of achieving the common goal. Speaking so your listeners will be able to "hear" you without perceiving an attack is critical in cross-discipline groups.