The difference between workday and free-day wake-up times isdefinitely correlated with morningness and eveningness.
工作日和假日不同的起床时间绝对和不同类型的人有关。
2
Children show amarked increase in eveningness from around age 13 to late adolescence, and, on balance, more people under 30 are evening types.
大约在13岁到青春期后期，儿童中晚上类型的人明显增多。 总的来说，在30岁之前，晚上类型的人居多。
3
The result is that thevast majority of school and work schedules are tailored to morningtypes. Few people are even aware that morningness and eveningness havea powerful biological component.