I've read that babies generally recognize and respond to their own name at around 5 months of age. How is this different for twins (particularly identical)? Being as they often (almost always!) hear their names mentioned together, when can they recognize which is their own name and which is their twin's...? Will they respond to both names? If so, for how long?
(My twins are nearly a year old, and I still can't tell if they know their own names or just respond to both. I was curious if there is any official data available.)