This video goes over one of the main experiments conducted by Dr Harry Harlow in his investigation on role of maternal dependency and social isolation in rhesus monkeys. Footage taken from an old documentary that I do not know the name of, sorry.
References:
Harlow, H. F., & Harlow, M. K. (1962). Social deprivation in monkeys. Scientific american, 207(5), 136-150.
https://scottbarrykaufman.com/wp-cont...
Thanks for watching! :)