This is a Dogtra collar used by Jamie Penrith, a balanced trainer in Devon, the U.K. I'm putting this up because Americans think anything said with a British accent sounds very smart!
If you are looking for "scientific" dog training, this is what that looks like -- a BALANCE of instruction, rewards-consequences, attention-gettting taps, the rare aversive-consequence, and more rewards, instruction, and taps. Does it work? Like new money.