Table 2.

Baseline performance on all independent measures by vulnerability group

	Vulnerability group
	Resilient		Intermediate		Vulnerable		All
	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.
PVT Raw Lapsesa	1.26	2.58	1.80	2.16	3.41	4.31	2.15	3.28
PVT Fastest 10% RT (ms)a	198.84	21.14	200.83	18.55	205.21	20.69	201.63	20.27
PVT False Startsa	1.26	1.72	1.53	1.82	1.58	1.58	1.46	1.71
DSST # Correctb	58.57	8.09	55.62	9.78	54.74	8.93	56.31	9.07
DS-Forward # Correctc	5.76	1.28	5.63	1.28	5.38	1.20	5.59	1.26
DS-Forward Maxc	6.87	1.17	6.74	1.18	6.58	1.03	6.73	1.13
DS-Back # Correctc	5.05	1.78	4.77	1.76	4.25	1.51	4.69	1.71
DS-Back Maxc	6.20	1.65	5.90	1.64	5.55	1.51	5.88	1.62
MWT (min)d	22.92	9.42	21.77	9.28	16.82	10.29	20.68	9.96
KSSe	2.97	1.37	2.97	1.25	3.22	1.30	3.05	1.31
POMS-Fatiguef	0.93	1.40	0.73	1.20	0.62	4.90	0.76	3.02
VAS Exhausted/Energeticg	33.64	34.97	26.47	31.79	12.58	20.76	24.22	30.96
EPI Extraversionh	14.93	3.60	15.37	4.16	15.74	3.65	15.35	3.81
EPI Lie/Desirabilityh	12.70	3.96	12.61	4.11	11.45	4.27	12.26	4.14
EPI Neuroticismh	5.32	2.34	5.18	2.26	5.52	2.25	5.34	2.28
EPI Psychoticismh	2.71	1.70	2.96	1.75	2.92	1.80	2.86	1.75
NAART FSIQi	105.67	8.90	103.76	8.33	104.55	9.12	104.66	8.80
Hayling Scaled Totalj	5.51	1.43	5.26	1.47	5.30	1.40	5.36	1.43

^aPsychomotor Vigilance Test.

^bDigit Symbol Substitution Test.

^cDigit Span Test.

^dMaintenance of Wakefulness Test.

^eKarolinska Sleepiness Scale.

^fProfile of Mood States—Fatigue.

^gVisual Analog Scale.

^hEysenck Personality Inventory.

ⁱNorth American Adult Reading Test.

^jHayling Sentence Completion Test.