As they looked into sex-segregation in childhood, the researchers found that segregation rose with age and that most Western children exhibit these preferences around 3–4 years old.
當他們研究童年時期的性別隔閡，研究員發現，性別隔閡會隨著年紀增長逐漸上升，而且大部分西方的小孩在3之4歲會顯現這些偏好。