In a separate NY Times article titled What Shamu Taught Me About a Happy Marriage (By AMY SUTHERLAND, June 25, 2006) the author cites experience preparing to write about animal training:

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I listened, rapt, as professional trainers explained how they taught dolphins to flip and elephants to paint. Eventually it hit me that the same techniques might work on that stubborn but lovable species, the American husband.

The central lesson I learned from exotic animal trainers is that I should reward behavior I like and ignore behavior I don't. After all, you don't get a sea lion to balance a ball on the end of its nose by nagging. The same goes for the American husband.
Back in Maine, I began thanking Scott if he threw one dirty shirt into the hamper. If he threw in two, I'd kiss him. Meanwhile, I would step over any soiled clothes on the floor without one sharp word, though I did sometimes kick them under the bed. But as he basked in my appreciation, the piles became smaller.

I was using what trainers call "approximations," rewarding the small steps toward learning a whole new behavior. You can't expect a baboon to learn to flip on command in one session, just as you can't expect an American husband to begin regularly picking up his dirty socks by praising him once for picking up a single sock. With the baboon you first reward a hop, then a bigger hop, then an even bigger hop. With Scott the husband, I began to praise every small act every time: if he drove just a mile an hour slower, tossed one pair of shorts into the hamper, or was on time for anything.

I also began to analyze my husband the way a trainer considers an exotic animal. … … …

The exotic animal known as Scott is a loner, but an alpha male. So hierarchy matters, but being in a group doesn't so much. He has the balance of a gymnast, but moves slowly, especially when getting dressed. Skiing comes naturally, but being on time does not. He's an omnivore, and what a trainer would call food-driven.

… … …

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woof

John