What the Dog Saw [110]
Choking sounds like a vague and all-encompassing term, yet it describes a very specific kind of failure. For example, psychologists often use a primitive video game to test motor skills. They’ll sit you in front of a computer with a screen that shows four boxes in a row, and a keyboard that has four corresponding buttons in a row. One at a time, x’s start to appear in the boxes on the screen, and you are told that every time this happens you are to push the key corresponding to the box. According to Daniel Willingham, a psychologist at the University of Virginia, if you’re told ahead of time about the pattern in which those x’s will appear, your reaction time in hitting the right key will improve dramatically. You’ll play the game very carefully for a few rounds, until you’ve learned the sequence, and then you’ll get faster and faster. Willingham calls this explicit learning. But suppose you’re not told that the x’s appear in a regular sequence, and even after playing the game for a while, you’re not aware that there is a pattern. You’ll still get faster: you’ll learn the sequence unconsciously. Willingham calls that implicit learning — learning that takes place outside of awareness. These two learning systems are quite separate, based in different parts of the brain. Willingham says that when you are first taught something — say, how to hit a backhand or an overhead forehand — you think it through in a very deliberate, mechanical manner. But as you get better, the implicit system takes over: you start to hit a backhand fluidly, without thinking. The basal ganglia, where implicit learning partially resides, are concerned with force and timing, and when that system kicks in, you begin to develop touch and accuracy, the ability to hit a drop shot or place a serve at a hundred miles per hour. “This is something that is going to happen gradually,” Willingham says. “You hit several thousand forehands, after a while you may still be attending to it. But not very much. In the end, you don’t really notice what your hand is doing at all.”
Under conditions of stress, however, the explicit system sometimes takes over. That’s what it means to choke. When Jana Novotna faltered at Wimbledon, it was because she began thinking about her shots again. She lost her fluidity, her touch. She double-faulted on her serves and mis-hit her overheads, the shots that demand the greatest sensitivity in force and timing. She seemed like a different person — playing with the slow, cautious deliberation of a beginner — because, in a sense, she was a beginner again: she was relying on a learning system that she hadn’t used to hit serves and overhead forehands and volleys since she was first taught tennis, as a child. The same thing has happened to Chuck Knoblauch, the New York Yankees’ second baseman, who inexplicably has had trouble throwing the ball to first base. Under the stress of playing in front of forty thousand fans at Yankee Stadium, Knoblauch finds himself reverting to explicit mode, throwing like a Little Leaguer again.
Panic is something else altogether. Consider the following account of a scuba-diving accident, recounted to me by Ephimia Morphew, a human-factors specialist at NASA: “It was an open-water certification dive, Monterey Bay, California, about ten years ago. I was nineteen. I’d been diving for two weeks. This was my first time in the open ocean without the instructor. Just my buddy and I. We had to go about forty feet down, to the bottom of the ocean, and do an exercise where we took our regulators out of our mouth, picked up a spare one that we had on our vest, and practiced breathing out of the spare. My buddy did hers. Then it was my turn. I removed my regulator. I lifted up my secondary regulator. I put it in my mouth, exhaled, to clear the lines, and then I inhaled, and, to my surprise,