...an early study at Yale demonstrated that infants laugh much more readily when tickled by their mothers than when tickled by a stranger. This kind of laughter isn't just a knee-jerk physiological reaction; it's a message used to regulate social interaction. #RobinHanson

...an early study at Yale demonstrated that infants laugh much more readily when tickled by their mothers than when tickled by a stranger. This kind of laughter isn't just a knee-jerk physiological reaction; it's a message used to regulate social interaction. #RobinHanson

— English Quotes (@english_quotes) Feb 13, 2024