Secret Training Weapon: History of Reinforcement
Many dog owners search and search for the correct tone of voice, hand signal, or word to get their dogs to do what they want. If there was just a magic “tone” that would get the dog to come when called, for example! People will try a friendly tone, a calm tone, a warning tone, a growly tone. Maybe a new tone works once or twice, but then it stops working, and the owner is back on the search for yet another tone. Or hand signal. Or body language and posture. Or whatever.