REPORTING FROM MEXICO CITY -- Is Mexico's an inherently racist society? Does the culture overwhelmingly favor those with light skin over those with dark skin? And if so, is that a legacy of European colonialism or present-day images in television and advertising?

These are among the thorny questions emerging in online forums in Mexico since a government agency began circulating a "viral video" showing schoolchildren in a taped social experiment on race.

The kids are seated at a table before a white doll and a black doll, and are asked to pick the "good doll" or the doll that most resembled them. The children, mostly brown-skinned, almost uniformly say the white doll was better or most resembled them.

One child in the video with mixed-race features says the white doll resembled him "in the ears."

"Which doll is the good doll?" a woman's voice asks the child.

"I am not afraid of whites," he responds, pointing to the white doll. "I have more trust."

Mexico's National Council to Prevent Discrimination, or Conapred, in mid-December began circulating the video, modeled on the 1940s Clark experiments in the United States. The children who appear in it are mostly mestizos, or half-Spanish, half-Indian, and a message said they were taped with the consent of their parents and told to respond as freely as they could.