What you see here is performance on that head-turn task for babies tested in Tokyo and the United States, here in Seattle, as they listened to "ra" and "la" -- sounds important to English, but not to Japanese.
Aqui tenen el rendiment en la tasca de girar el cap en nadons examinats a Tòkio i als Estats Units, aquí a Seattle, mentre escoltaven "ra" i "la", sons importants en anglès, però no en japonès.