Table 1.

Demographic data, psychological traits, and sleep evaluationa

Experiment 1Experiment 2
SC (n = 22)SD (n = 25)pSC (n = 17)SD (n = 19)p
Age (yr)23.3 ± 1.223.2 ± 1.70.86824.0 ± 1.224.1 ± 1.50.819
Male, n (%)13 (59.1)14 (56.0)0.8319 (52.9)9 (47.4)0.738
BMI (kg/m2)21.6 ± 2.521.0 ± 2.60.43320.5 ± 2.121.4 ± 2.70.265
Education (yr)17.0 ± 1.316.7 ± 1.60.58218.1 ± 1.218.0 ± 1.30.785
BDI1.4 ± 2.02.3 ± 2.50.1572.6 ± 1.91.7 ± 1.90.162
HAMA2.2 ± 2.13.6 ± 3.40.1053.7 ± 3.62.1 ± 2.20.103
BIS62.5 ± 4.262.7 ± 9.50.95162.6 ± 7.961.5 ± 6.30.656
    Attentional impulsiveness21.9 ± 2.721.4 ± 3.50.58521.1 ± 3.021.5 ± 3.30.699
    Motor impulsiveness15.5 ± 3.015.6 ± 2.50.89515.8 ± 3.815.9 ± 3.00.873
    Nonplanning impulsiveness25.2 ± 3.225.8 ± 4.90.66425.8 ± 3.224.1 ± 3.50.144
MoCA29.0 ± 0.828.8 ± 1.20.50229.0 ± 1.028.9 ± 0.80.860
WM capacity51.8 ± 12.247.2 ± 18.30.32646.5 ± 12.851.6 ± 11.60.218
ESS5.8 ± 2.66.8 ± 2.80.2208.1 ± 3.67.1 ± 2.60.368
PSQI3.0 ± 1.43.1 ± 1.70.2534.4 ± 2.13.7 ± 1.80.309
Habitual sleep duration (h)b7.3 ± 0.57.5 ± 0.60.7187.5 ± 0.87.2 ± 0.60.214
MEQ54.5 ± 7.152.3 ± 7.20.31352.0 ± 7.955.4 ± 5.80.160

  • ↵aData are mean ± standard deviation. BMI, Body mass index.

  • ↵bHabitual sleep duration came from participants' answers to the question in PSQI; that is, “How many hours of actual sleep did you get at night during the past month?”