Reading a fighter is easier to do when you are on the outside looking in, or is it. Ward knew he had Dawson on this weigh-in stare down. Many other fighters have stated that what they look for is posture, seeing how they react to the stare you're giving em, most stare back too hard, which means they are forcing themselves to be something they are not and that usually shows up in the fight at some point.
One trainer saw that his fighter was so worked up at the weigh-in he began getting into a shoving match with his opponent and ended up fighting the wrong fight on fight night. It's sometimes normal for one fighter to do things out of his own character to get a reaction out of his opponent, just to get a read on him. This is not just a chess match, this is high speed poker.