Dog_ma
If no one has ever communicated "Don't chew shoes" then it remains a very viable option. Shoes are tasty.
But it doesn't, honestly. In terms of reinforced responses - if something, such as a dog's toy, is always reinforced, and attempts to chew at shoes are always redirected and never reinforced, then a dog will learn to leave shoes well enough alone. If you haven't tried it, it might not be clear, but for those who use it it's very clear. You don't have to punish to teach dogs to leave things alone. Dogs learn habits well, and once a habit of "these are things that I have been told are great to play with", they will play with those toys. I guess you could say the communiction of "Don't chew shoes" is communicated through saying "Here, chew this instead" by redirecting and reinforcing for that.
Heck, I have even taught my guys to handle various household items with their mouths - remotes, brushes, combs, make-up bottles, etc, in teaching "retrieving to hand" exercises, and even then they leave them alone unless they were asked for. :-) You would think that by reinforcing those things would make them think it was okay to play with, but it doesn't, since it's the specificity of context.
I'm sure you did not have to punish your dog for every item in the house "except" its toys, rather you likely punished for a few, but also reinforced a lot more for its appropriate items. That would make for an unfortunate puppyhood, as a house holds a lot of items *G*.
Dog_ma
But, but ... how do they know what isn't theirs, if never taught "no"?
Well, I don't know what dogs think of as "theirs" vs "mine". I don't think dogs really think much like that, possession to them is quite temporary, only as long as they have it in their possession is it "theirs". But what I do know is that it works well, and the dogs tend to leave things be that are not theirs, through consistent redirection to appropriate chewing items. The key though is consistency and good timing, if the dog has already been chewing on a pencil for five minutes, it's not as effective as if you saw the pup doing it right as it went to grab the pencil, as the dog has then become reinforced for the pleasure in chewing the pencil.
Dog_ma
If you hadn't guessed, I take a very liberal and literal use of the word punishment.
I had guessed, yes, based upon your next statement:
Dog_ma
In my mind, if you are teaching a dog "Don't do X" (As opposed to simply encouraging Y, which leaves X as a possibility) then you are using P+, because you are decreasing the probability of X happening.
That is not how P+ is defined though. The behaviour of "chewing on the pencil" hasn't been punished, rather it goes extinct through lack of reinforcement. If the dog is never reinforced for touching it, eventually it won't be worth touching, when there are lots of "fun" touchables on the floor. I do "prevent" the dogs from doing "X", but not by saying "Don't do X", but rather by saying "Y is much more beneficial". You added in that it still leaves X as a possibility, but in my experience it never ends up being the case that way. If the dog isn't reinforced for doing X, it won't keep trying to do X, as the cost/benefit analysis doesn't pay off when the perfectly acceptable Y is lying right beside it. Why keep trying to do something that never really pays off?
I can teach a formal heel by giving rewards simply when the dog is where I want it. By walking around the yard aimlessly and giving a reward when the dog gets where I want, I can teach a strong heel. That doesn't mean that I have punished "being away from me". It just means that I have made "being next to me" very rewarding.
A dog that tries to paw for a leaf on the other side of the fence, but cannot reach it, will eventually stop trying to reach the leaf. The dog wasn't "punished" in any way, the attempts at doing it simply didn't pay off with reinforcement (the leaf), so the dog gave up trying.
Do you see the distinction yet? I have tried to supply a few other examples of the same meaning to see if it helps.
Dog_ma
But chewing shoes is rewarding,
It's only rewarding if the dog knows that chewing shoes are rewarding. For chewing shoes to be rewarding, the dog would have to have had experience chewing shoes. My goal is not to give the dog that rewarding experience in the first place (management at first, then redirection), and to make something else much more rewarding.
Dog_ma
And I have to say - a body block is P+. You aren't a rock. You are actively communicating "stop that." In a very forceful way - more forceful because of your calm!
No it's not. I'm not applying anything. I'm just there. I'm not communicating "stop that". I'm communicating "Try all you want buddy, but I ain't moving". They are two very different thing! If I was communicating "Stop that", I would be doing something that stopped it immediately. If I were to say "stop that" I wouldn't just stand there. But I'm not stopping it immediately, I'm just making it non-rewarding for the dog, and not worth the dog's time. When I say I do a body block, I'm just there. I'm not pushing into the dog (but I'm not moving backwards either, just holding ground), I'm not even interacting with the dog. In order for it to be a positive punishment I would have to "apply" something (such as "no", pushing into the dog, staring at the dog, or popping a leash on the dog). If one were really stretching to try to prove that someone used P+ you could say that my "body" was the applied stimulus, but the fact is the dog stops trying because reward can't be obtained, not because I've actively done anything aversive to make the dog think it should avoid the object. It would be no different if every time the dog approached the object and a magical wall appeared as the dog approached it, where the dog could see it but could not reach it. Same as the fence analogy above. The fence certainly isn't punishing the dog, it's simply preventing access. They are two very different things. It stops behaviour, but through extinction, not punishment.