If your horse simply ignores the neck lariat, you may find that a wooden neck ring can give a stronger signal in the early stages of training. Here the rider demonstrates positioning the neck ring for a turn. Notice how much like neck reining the signal is. Within a few minutes of adding the neck ring, Scarlett lifts her withers, lengthens and rounds her topline from withers to poll and engages her hindquarters. Valerie's position is more stable.
Most people talk about starting collection through the engagement of the hindquarters.
Often what you see is quite the opposite-the horse's head is set in the front and the rider pushes the horse into the hand. It's a little like trying to drive a car with the emergency brake on. There is a passive reflex at the base of a horse's neck called the seeking reflex. That is what is happening with Scarlet in photo 7. As this is happening, the horse's belly muscle engages and the back comes up.