By your reaction, I would say that you have quite a lot of power.

He did not seem pleased by our reaction to his stage.

Another doctor might have given up, affected by the child's reaction.

He was just too embarrassed by his reaction to them!

He couldn't be sure; but if she did, the man, to judge by his reaction, was not much interested.

He stood there for a moment, too stunned by her reaction to move.

It seemed as if I had already been in battle, judging by my body's reaction.

Appalled by the boy's reaction, James held up his hands.

To judge by the dog's reaction, someone or something was aboard his ship.

I just told her by my reaction that there's something unresolved between Data and me.