New York Times: Psychologist discusses fearlessness, aggression in tots

An article in The New York Times about a study that showed that high levels of fearlessness in 3- and 4-year-old children is strongly associated with aggression and a lack of empathy quotes Jamie Ostrov, assistant professor of psychology. He says that children at the extreme end of the fearless spectrum "may be charming, but they're also highly manipulative and deceptive and skilled at getting their way – even at ages 3 or 4."