It was discovered that IQ fastigium age was before 7 years and there was a falling gradient in IQ between 8-0. As a conception of "warning age" in IDD area and that of "key age" for prevention and treatment were established.
It was discovered that IQ fastigium age was before 7 years and there was a falling gradient in IQ between 8-0. As a conception of "warning age" in IDD area and that of "key age" for prevention and treatment were established.
由于发现IQ高峰年龄在7岁以前及8～0岁时间有个“IQ跌梯”现象,故提出缺碘地区的“警界年龄”、防治的“关键年龄”概念。