We had heard before that babies don't realize that reflection in the mirror is theirs until about eighteen months, but we just didn't believe it...surely she knows by now that's her- we thought at about 12 months. So, we tried this little test ourselves to find out...
This article in Babble explains how researchers dab a colored spot on a baby's face to see if they will try to wipe it off when they see their reflection; most don't until 18 months.
Well, we were sure when we dabbed cottage cheese on our baby's face she'd go to wipe it off- but she didn't do a thing. Just smiled at the mirror as usual.
Like the article says, self-awareness is one of our most sophisticated abilities as humans.
Try out this little experiment at home!