The association between eveningness and autistic traits: Mediating effects of depression and insomnia

Figures & data

Table 1. Descriptive statistics for each scale and subscale.

	Mean	Standard Deviation	Skewness	Kurtosis	Actual Range	Possible Range	Cronbach’s Alpha
Morningness-Eveningness	30.48	7.22	0.82	−0.44	14–48	13–55	0.86
Morning Affect	9.10	2.62	0.04	−0.40	4–16	4–16	0.78
CES-D	12.25	5.79	0.47	−0.20	1–29	0–30	0.84
ISI	11.06	5.67	−0.01	−0.61	0–24	0–29	0.82
AQ−28 Total	65.24	10.10	0.27	1.51	35–104	28–112	0.85
AQ−28 Imagination	16.87	3.59	0.24	1.05	8–31	8–32	0.72
AQ−28 Social Skills	19.63	4.65	0.33	0.17	9–32	8–32	0.85
AQ−28 Numbers/Patterns	10.99	3.33	0.00	−0.23	5–19	5–20	0.83
AQ−28 Routine	10.43	2.25	−0.08	0.11	4–16	4–16	0.62
AQ−28 Attention Switching	10.28	2.07	0.52	0.23	6–16	4–16	0.61

N = 163. CES-D = Centre for Epidemiological Studies – Depression Short Scale; ISI = Insomnia Severity Index; AQ−28 = Autism Quotient.

Table 2. Correlations between study variables.

	CES-D	ISI	Morningness-Eveningness	Morning Affect
Total AQ−28	0.33***	0.24**	0.03	−0.06
AQ−28 Social Skills	0.30***	0.24**	0.04	−0.04
AQ−28 Routine	0.33***	0.16*	−0.04	−0.14
AQ−28 Imagination	0.20**	0.10	0.02	−0.02
AQ−28 Attention Switching	0.29***	0.16*	−0.16*	−0.26**
AQ−28 Numbers and Patterns	0.04	0.12	0.08	0.09
CES-D	-	0.63***	−0.35***	−0.35***
ISI		-	−0.39***	−0.39***
Morningness-Eveningness			-	0.71***

N = 163. CES-D = Centre for Epidemiological Studies – Depression Scale Short. ISI = Insomnia Severity Index. AQ−28 = Autism Quotient. *p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001.

Figure 1. Mediation effects of depression.

Figure 2. Mediation effects of insomnia and depression.