. Author manuscript; available in PMC: 2012 May 1.

Published in final edited form as: Dev Psychol. 2011 May;47(3):693–706. doi: 10.1037/a0021909

Table 1.

Descriptive Statistics and Correlations Among Study Variables

Variable	1	2	3	4	5	6	7	8	9	10	11	12	M	SD
1. Sex^a	—												—	—
2. Age (months) at T1	−.16^*	—											98.71	8.71
3. Ethnicity^b	.04	−.08	—										—	—
4. SES	−.03	.07	−.22^**	—									37.38	9.92
5. Internalizing (child report)^c	.11	−.13^*	.12	−.03	—								0.00	.85
6. Marital conflict	−.01	.04	.16^*	−.09	−.01	—							4.21	4.69
7. Harsh parenting (child report)	−.22^**	−.06	.09	.04	.31^**	−.06	—						5.47	4.90
8. Harsh parenting (parent report)	−.05	.04	.01	.02	.06	.39^**	.15^*	—					5.86	3.71
9. SCLR-stress^d	.01	.01	−.11	.10	.05	.12	−.02	.05	—				−0.10	1.29
10. SCLR-challenge^d	.05	.05	−.19^**	.11	−.04	.06	−.16^*	−.01	.51^**	—			−0.09	2.38
11. T1 Externalizing	−.05	.03	.01	−.12	.14^*	.15^*	.19^**	.43^**	−.13	−.13^*	—		4.92	3.74
12. T2 Externalizing	−.17^*	.09	−.05	−.11	.17^*	.10	.21^**	.24^**	.05	−.05	.71^**	—	4.73	3.82
13. T3 Externalizing	−.07	−.01	−.11	−.07	.16^*	.05	.22^**	.25^**	.07	.03	.63^**	.74^**	4.36	3.97

Note. SCLR = skin conductance level reactivity.

Sex was coded 0 for boys and 1 for girls.

Ethnicity was coded 0 for European American and 1 for African American.

Standardized score.

SCLR-stress and SCLR-challenge are residualized scores that represent change from baseline to lab tasks, such that a positive score indicates higher levels of SCL during the task than during baseline.

p < .05.

^**

p < .01.