Respect is indicated by not entering your space unless invited, by moving out of your path, by backing with light touch on nose or with quiet hand signal. Trust is indicated by the horse accepting gentle approach and by not shying away from touch. As the horse learns to respond to a lower command strength, lower the strength of the Request, Ask, Require levels. The idea is that the horse will learn to respond at the Ask level to avoid the Require level and the horse will learn to respond to the Request level to avoid the Ask level. By lowering the strength of the Request, Ask, Require levels, the horse will become very sensitive to the command.
Timing is critical.
Remove the command as soon as the horse responds correctly to any degree. As the horse responds more correctly, require a slightly more correct response before removing the command. It is the removal of the command that constitutes a reward and reinforcement for learning. The removal is most effective in the first second after the correct response. Beyond three seconds is usually ineffective.