I prefer the method of «choice» when doing behavior modification because of the ability to control the stress level. (catbehaviorassociates.com)
For example, how does the behavior of water molecules and sulfur oxide impact the creation of acid rain? (pnnl.gov)
Can your dog do the behavior if you are sitting, standing, lying on the floor, wearing sunglasses, a hat, talking on your phone, etc? (spotmagazine.net)