Genies case illustrates that the brain has critical periods of development and if these periods are missed the individual is unlikely to develop normally in this area of Their life

Based on Genie's case, the brain has critical periods of development during early childhood. Genie missed these periods when she was completely socially isolated and kept away from other people during her early childhood to early adolescence. This resulted to the underdevelopment of the basic skills which a child should acquire.