Why do we sometimes fail to perform up to what we're capable of when the pressure is on? It may not be so surprising to hear that in stressful situations, we worry. We worry about the situation, the consequences, what others will think of us. But what is surprising is that we often get in our own way precisely because our worries prompt us to concentrate too much. That's right — we pay too much attention to what we're doing. When we're concerned about performing our best, we often try and control aspects of what we're doing that are best left on autopilot, outside conscious awareness, and as a result, we mess up. Think about a situation where you're shuffling down the stairs. What would happen if I asked you to think about what you're doing with your knee while you're doing that? There's a good chance you’d fall on your face. We as humans only have the ability to pay attention to so much at once, which is why, by the way, it's not a good idea to drive and talk on the cell phone. And under pressure, when we're concerned about performing at our best, we can try and control aspects of what we're doing that should be left outside conscious control. The end result is that we mess up. My research team and I have studied this phenomenon of overattention, and we call it paralysis by analysis.