None of this makes a ton of sense really, but keep in mind that these are children. They eat snot sometimes. And however nonsensical it may seem to us brilliant adults, at least they are being consistent. When their eyes are covered up, they feel invisible. But there's a twist here. When pressed on exactly what their invisibility meant, the children in both of the aforementioned phases of the study admitted that, okay, their bodies were still visible when their eyes were covered. It was their "self" that was hidden, or at least that is the implication; children seem to draw a distinction between body and "self" and the self seems to be universally described as living in the eyes in some sense--unless the eyes of two people meet, they cannot actually perceive each other.