Table 1.

Mean sleep onset times, final wake-up times, and total sleep time for morning (MT) and evening type (ET) participants in the week prior to the laboratory session showing the difference and t-test results of the difference

	MT	ET	Difference hours	t
Sleep onset time	2324 (1.07)	0159 (1.28)	2.58	4.9*
Final wake-up time	0748 (1.0)	1020 (1.59)	2.53	4.29*
Total sleep time (hrs)	8.15 (0.64)	8.20 (0.73)	0.05	n.s.

Note:

^*P < 0.001.