Equitation refers to a rier's position while mounted, and encompasses a rider's ability to ride correctly and with effective aids. In competitions, this is judged in equitation classes, or classes at horse shows that mainly judge the rider's performance and control of the horse, as opposed to the performance of the horse. Equitation classes occur in the Hunt seat, Saddle seat, Dressage, and Western disciplines. A good equitation rider is always in balance with the horse, maintains a correct position in every gait, movement, or over a fence, and possesses a commanding, but relaxed, presence. They are effective riders, able to direct the horse with nearly invisible aids.