Table 2.

Unweighted Bivariate Correlations Between All Study Variables.

Variable	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20
1. Income/Needs	—
2. Parent Edu	.61	—
3. Child age	.05	.03	—
4. Child IQ	.39	.39	.07	—
5. Child Recept	.40	.43	.07	.63	—
6. Child PS-Code	.20	.22	−.11	.35	.34	—
7. Child PS-SS	.29	.30	−.02	.44	.43	.53	—
8. EF (age 3)	.23	.24	.00	.41	.38	.18	.27	—
9. EF (age 4)	.28	.33	.08	.55	.55	.34	.43	.37	—
10. EF (age 5)	.26	.29	.04	.48	.53	.34	.34	.32	.59	—
11. WJ-LW	.28	.29	−.28	.31	.37	.32	.33	.17	.30	.29	—
12. WJ-PV	.34	.32	−.08	.46	.62	.21	.28	.23	.41	.37	.43	—
13. WJ-AP	.32	.33	−.15	.51	.58	.36	.42	.33	.50	.49	.54	.56	—
14. Acad Skill	.28	.32	.21	.44	.49	.32	.33	.24	.41	.40	.53	.40	.47	—
15. Prob Promo	.25	.25	.19	.39	.46	.25	.29	.25	.34	.40	.39	.33	.40	.68	—
16. Black	−.39	−.25	−.19	−.38	−.45	−.11	−.20	−.30	−.34	−.27	−.01	−.23	−.29	−.15	−.24	—
17. Male	.04	.01	.02	−.16	−.06	−.23	−.10	−.09	−.14	−.13	−.06	.05	−.02	−.05	−.08	.01	—
18. IES	−.12	−.08	.02	−.22	−.19	−.16	−.11	−.11	−.20	−.22	−.23	−.21	−.28	−.20	−.19	−.00	.07	—
19. Services	−.14	−.18	−.08	−.28	−.27	−.16	−.17	−.14	−.25	−.28	−.16	−.19	−.24	−.31	−.31	.10	.06	.32	—
20. Concerns	−.22	−.27	−.15	−.37	−.41	−.24	−.26	−.18	−.37	−.40	−.34	−.30	−.38	−.61	−.56	.15	.14	.18	.33	—

Note. Parent Edu = parent education; Child Recept = child receptive language; PS = processing speed; Code = coding; SS = symbol search; EF = executive function; WJ = Woodcock Johnson; LW = Letter Word Identification; PV = Picture Vocabulary; AP = Applied Problems; Acad Skill = academic skill rating; Prob Promo = probability of promotion; IEP = Individualized Education Program. Children were assigned to typical and delay EF groups on the basis of posterior probabilities from the growth mixture models and were assigned solely for purposes of sample description.