Two-fers and three-fers?

Question

hi,there.I read a article about  training dog. it reads:For whatever reason, two-fers and three-fers have become a rote part of clicker training methodology. Okay, I'm getting the behavior I want, now quick let's start doing two-fers and three-fers. They're being added with no understanding of what they are or how they affect traininghttp://www.clickersolutions.com/articles/2001/twofers.htm  here is the article.what 's the meaning of " two-fers and three-fers "?  all my dictionaries have no such words.i got stumped.thank you!

Mister Micawber · Accepted Answer

The article explains them in detail. A two-fer is getting two behaviors with one reinforcement (e.g. sit and sit straight for one click of the little training device). To excerpt from your article:

Two-fers and three-fers and such are what's called a variable schedule of reinforcement (VSR). An animal will continue working because it MIGHT get reinforced.

Pet owners want a dog who will, when asked to sit, plop his **** on the ground. Competition obedience people want a dog who will sit tucked, straight, square, and fast.

The pet owner's dog is offering sits. Sometimes they're straight, sometimes not, sometimes they're square, sometimes they're cockeyed -- it really doesn't matter. All the pet owner wants is for the dog's **** to be on the ground.

Now let's look at how a VSR can affect a precise behavior. Competition obedience people want a dog who will sit tucked, straight, square, and fast. To get that sit, they shape one criteria at a time. I want a tucked sit. I click ONLY tucked sits. If I don't click, that's a signal that the dog has done something wrong and should try something different.

Sandy Ho · Answer

thank you for your explanition!

i finally get the idea what a two-fer is:

see here:

http://www.thefreedictionary.com/twofer

and it does mean what you explaned in this particular article.

Two-fers and three-fers?

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