Self-Control Questions

Over at the New Yorker website, I've answered a few questions from readers about the marshmallow task:

Do you think the future results of success would be different for a sample of kids born in the twenty-first century considering the decades of behavioral, economical changes in the society?
Hassan Patwary
San Jose, Calif.

I think it would be hard to replicate the marshmallow task now, if only because it's gotten much tougher to feed hundreds of preschoolers sugary snacks in the name of scie