Table 2.

Bivariate Correlations for Sibling Individual-Level and Family-Level Variables

Sibling-level variables
	1.	2.	3.	4.	5.	6.	7.	8.	9.	10.	11.	12.	13.	14.	15.	16.
1. Positive affect - total
2. Positive affect - toward	.931**
3. Positive affect - from	.984**	.766**
4. Pessimism	−.163*	−.194*	−.119
5. Adult sibling age	−.117	−.091	−.121	−.187**
6. Adult sibling gender	.084	.102	.064	.040	−.083
7. Gender composition	.070	.081	.057	.022	−.060	.917**
8. Adult sibling education	−.167*	−.134	−.169*	.020	.124	.027	.018
9. Contact	.321**	.336**	.275**	.099	−.216**	.003	.009	−.194*
10. Relationship in adolescence	.562**	.523**	.536**	−.061	−.113	.058	.047	−.134	.282**
11. Parental support	.218**	.178*	.230**	.015	−.020	.064	.024	−.255**	.192**	.156*
12. Adult sibling depressive symptoms	−.133	−.127	−.117	.199**	−.036	−.006	.004	−.105	−.063	−.057	−.061
13. Adult sibling problem-focused coping	.087	.103	.055	−.098	.165*	.052	.110	.190**	−.074	.009	−.112	−.378**
Family-level variables
14. Age of b/s with ASD	−.129	−.122	−.114	−.175*	.788**	−.109	−.090	.164*	−.205**	−.231**	−.020	.005	.060
15. Family size	−.110	−.088	−.100	−.202**	.453**	−.092	−.138*	−.057	−.117	.007	−.114	−.034	.024	.234**
16. Challenging behaviors in b/s	.020	.004	.027	.219**	−.450**	.010	−.008	−.072	.167*	.049	−.068	.043	−.055	−.360**	−.279**
17. Intellectual disability in b/s	−.180*	−.113	−.214**	.138*	−.050	−.080	−.093	−.158*	.027	.035	.009	−.039	−.080	−.024	.059	.059

^*p < .05

^**p < .01