Too many people are unclear in what, where and how they communicate with their horse. They unintentionally "challenge" the horse into guessing what they want. Then they reprimand the horse every time he can't figure it out. Or they present a task using the same manner of communication repetitiously, driving the horse's stress levels up, until he accidentally figures out what the person is asking. The more the horse has to "guess" at what the person wants, the more he will tune out the person's aids or communication and can become dull and unresponsive to the aids or feel like he is "taking over" during the session.
