“Music is inherently bound up with personal identity, and so [when people can] identify pieces of music without a lot of information, it’s often music from their youth [which can trigger] what we call the reminiscence bump in autobiographical memory,” “Older adults have a good memory for certain songs from their youth because they listened to that same record over and over … It can bring back your memories from that time period when you were having these self-defining experiences.”
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time.com
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Why We Remember Music and Forget Everything Else
Psychologists say it's no surprise that we have such a strong memory for music and can easily recall lyrics and melodies, even if we haven’t heard them in years.