for infants to develop qualities like perseverance and focus, they need a high level of warmth and nurturance from their caregivers. What Spiegel’s success suggests, though, is that when children reach early adolescence, what motivates them most effectively isn’t licking and grooming–style care but a very different kind of attention. Perhaps what pushes middle-school students to concentrate and practice as maniacally as Spiegel’s chess players do is the unexpected experience of someone taking them seriously, believing in their abilities, and challenging them to improve themselves.