Darlene explained that she carried around a picture in her mind of what a healthy baby ought to look like—and the infant in the crib, when she glanced at her, hadn’t matched that image. So the spotlight inside Darlene’s head went to the child’s skin, the blot of blood on her heel, and the distended belly. It focused on those unexpected details and triggered Darlene’s sense of alarm. The other nurse, in contrast, didn’t have a strong picture in her head of what she expected to see, and so her spotlight focused on the most obvious details: The baby was eating. Her heartbeat was strong. She
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