What was learned about social isolation from the study of Genie?

The study of Genie, a girl who was severely socially isolated during her childhood, highlighted the critical period hypothesis, suggesting that there are certain Windows of time during development where social interaction is crucial for normal development. Genie's case emphasized the importance of early socialization and language exposure for cognitive and emotional development, as she experienced significant deficits in these areas due to her isolation. Overall, the study of Genie underscored the detrimental effects of extreme social isolation on human development.