Inter-genotype comparison of number of days taken to reach PS50 in the serial phase-advance experiment, analyzed using zeroed data.

LD1-5 = successive phase-shifts.PS50 = number of days for the onset of activity of the mice to advance by 2 hours during each 4 hour phase-shift.Onset times were zeroed to the final day before each phase-shift.LD1-5 指代连续相位偏移（successive phase-shifts）。PS50 代表在每4小时相位偏移过程中，小鼠活动起始时刻提前2小时所需的天数。活动起始时刻均以每次相位偏移前的最后一日为基准完成归零校准。