What Is a Sensitive Period?

Whet i did is onto basically distinguished between a local and national sensitive period, and then between what i call what others call vocal events and disruptive events. So what is a focal event? A vocal event is something like june fourtha, which everyone knows nd as very important and in advance. Disruptive event: things that happen without somebody knowing about it. The chinese system actually conceptualized these asa too far, cono cheten. And has measures and playe at every level of hierarchy.