They take a long time in making their decisions. Reassurance and confidence building are ways you can help them. Ostrich act like they have their heads stuck in the sand. They act like change will simply go away if they ignore it. Get them actively involved so that they know change is taking place.
Antagonists oppose change no matter how small simply because it is change.
They are loud and vocal and are unwilling to compromise or negotiate. People have different reasons for being motivated to do something. If you do not select the right motivator you will not get your employees motivated. Urgency if you are asking people to change you have to show them that there is an important and time reason for it. Inspiration elevates the spirit and provides direction.