Dogs associate verbal and visible commands with the state in which they find themselves at that moment. Command a dog to “Come” while he is lying down, before proper association has been made and you will merely be reinforcing the dog’s beliefs that the state of lying down and the command to come are the same.
Hence, we are losing ground and every repetition simply ingrains him more deeply with the belief that lying down is equal to the command “Come”.
Instead, attach a long leash to the dog while he is sitting in the backyard, call his name and command him to “Come” while simultaneously beginning to gently reel him in.
5 or 10 repetitions later he will begin to cooperate, especially as he receives praise when he completes his journey toward you each time. It is this simple. Soon he will no longer need support, for having associated the demand with the action, it will be part of his nature to simply come to you upon command.
And what has all this to do with child training? I will draw the parallel tomorrow…