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Karen's Letters

The Limited Hold

The limited hold is scientific terminology—laboratory slang, really—for a good way to use the marker and reinforcer to speed up response to a cue. We're all used to sluggish responses. You call folks for supper, and in due course, they come; meanwhile the soufflé falls or the soup gets cold. You call your dog to come in the house and it comes, grudgingly, finding half a dozen new things to sniff at before actually reaching the back door. Here's how you can fix that.

The Beginners' Clicker Class

What is a beginner clicker class? Is it an ordinary six-week long basic pet owners' obedience class, with clickers added?

I don't think so.

Jackpots: Hitting it Big

Jackpots!

A good thing? A bad thing? A nonexistent thing?

Let me tell you what I mean by "jackpot." I mean exactly what the casinos mean: a surprisingly big reinforcer, delivered contingently. The key is in the word, contingent. To reinforce a particular behavior, a jackpot has to appear, and be perceived by your learner, while the learner is doing that particular thing you want. Not afterwards.

Charging the Clicker

At an annual meeting of the Association for Behavior Analysis, where over 2,000 behavioral scientists gather each year, a woman professor with whom I was acquainted told me she had organized, among her students, a Rat Olympics. I was excited! What a good way to interest students in operant conditioning!

The Panda Game

Miniature horses are a special breed. According to horse owners, miniature horses are not descended from ponies, but developed from regular horses. Most of them are about the size of a large dog, and, like some large dogs, they make great guides for blind people.