Table 2.

Correlations Among Temperament and Attachment Security in Toddlerhood and Achievement and Scholastic Competence in Early Adolescence

Variable	1	2	3	4	5
Early childhood (ages 2–3)
1. Observed/behavioral effortful control	—
2. Effortful control reported by mothers (CBQ)	.44 **	—
3. Attachment security (AQS)	.19*	.28**	—
Adolescence (ages 11–15)
4. ITBS and ITED: reading	.27**	.27**	.16	—
5. ITBS and ITED: math	.10	.20*	.16	.56 **	—
6. CBCL: scholastic competence	.19*	.18*	.24**	.43 **	.54 **

Note: Correlations of moderate to large magnitude are in boldface type. CBQ = Child Behavior Questionnaire (Rothbart & Bates, 2006); AQS = Attachment Q-set (Waters & Deane, 1985); ITBS = Iowa Test of Basic Skills (Hoover, Dunbar, & Frisbie, 2001); ITED = Iowa Test of Educational Development (Feldt, Forsyth, Ansley, & Alnot, 1993); CBCL = Child Behavior Checklist (Achenbach & Rescorla, 2001).

^*p < .05 (two-tailed). **p < .01 (two-tailed).