Table 1 Participant demographics.

From: Supervision of a self-driving vehicle unmasks latent sleepiness relative to manually controlled driving

 

Study 1 M (± SD)

Study 2 (Replication) M (± SD)

Study 3 (Music) M (± SD)

n

19

20

20

Age (years)

33.0 (10.4)

35.9 (15.3)

34.1 (15.1)

Sleep duration (h)*

5.9 (0.9)

5.9 (1.0)

6.1 (0.9)

Habitual bedtime

00:46 (1:35)

0:07 (1:20)

0:22 (1:22)

Habitual waketime

7:49 (1:33)

7:12 (1:22)

7:20 (1:12)

PSQI

5.4 (3.9)

5.0 (2.3)

6.4 (2.7)

FSS

29.2 (7.4)

31.2 (10.3)

30.0 (8.5)

MEQ

50.0 (12.4)

52.5 (8.4)

50.8 (9.4)

Daily caffeine (cups)

1.5 (1.2)†

1.2 (1.4)

1.3 (1.5)

Years licensed

15.6 (10.3)†

18.8 (15.0)

17.4 (13.5)

Weekly drive time (h)

6.4 (4.6)†

10.3 (7.4)

8.2 (6.2)

Commute time (m)

34.5 (33.0)†

46.7 (35.5)

42.5 (31.9)

 

n (%)

n (%)

n (%)

Male

11 (58)

10 (50)

11 (55)

  1. *As measured by actigraphy during the two weeks prior to the study; †n = 13 for these questions, as a questionnaire with these items was sent retrospectively to participants in Study 1; Commute time = one way; PSQI = Pittsburgh Sleep Quality Index; FSS = Fatigue Severity Score; MEQ = Morningness-Eveningness Questionnaire; h = hours; m = minutes; M = mean; SD = standard deviation.
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