Jack Martin and David Cox The Big Idea It is rare in conventional social psychological research on sport to consider public testimony as a source of truths. And yet, this is exactly what this study does. These authors pursue what they call a “portrait of possibility.” The subject—the only subject—is the early life of one heck of a basketball player: the Canadian Steve Nash (b. 1974) who played 18 years in the NBA (National Basketball Association), nearly half of those years an NBA All-Star and…