A second trial asked them to identify the life stage of the person: childhood, adolescence, or adulthood.
Meanwhile, dozens of electrodes were examining the mix of brainwaves generated from their grey matter, painting a map of neural activity.
The result strongly suggest our impression of our ‘I’ is updated throughout our lives, giving stability to or identity.
And they also discovered intriguing similarities in how we process impressions of our past self and that of our close friend.
This suggests a complexity in how time may play a key role in forming impressions of our identity.