Appendix A.

Covariance Matrix of Task Indicators Used in the Latent Variables Analysis as a Function of Age Group

Group		Indicator	1	2	3	4	5	6	7	8	9	10
Early Childhood (n = 36)	1	Simple RT	.63
	2	SRC Compatible RT	1.63	14.60
	3	GNG Go RT	.35	1.65	.49
	4	SRC Incompatible RT	1.86	15.32	1.56	20.06
	5	DS Forward Total	.39	1.81	.59	1.77	3.82
	6	DS Backward Total	.48	2.62	.47	3.84	2.07	4.05
	7	RS Max Shape	.25	1.07	.17	1.31	.51	.91	.99
	8	RS Max Location	.26	1.67	.31	1.91	.94	.59	.49	.85
	9	2B Location Error Rate	.04	.19	.02	.27	.04	.10	.07	.06	.02
	10	2B Letter Error Rate	.03	.11	.01	.18	.05	.04	.06	.03	.01	.01
Late Childhood (n = 36)	1	Simple RT	.56
	2	SRC Compatible RT	1.99	19.04
	3	GNG Go RT	.37	2.51	.58
	4	SRC Incompatible RT	2.20	19.29	2.73	24.40
	5	DS Forward Total	−.23	2.32	.04	1.53	3.77
	6	DS Backward Total	.11	.95	.14	1.67	1.08	3.45
	7	RS Max Shape	.13	.82	.09	1.19	.85	.95	1.30
	8	RS Max Location	.24	1.52	.23	2.32	.07	.25	.43	.71
	9	2B Location Error Rate	.03	.11	.02	.18	−.01	.03	.06	.06	.02
	10	2B Letter Error Rate	.01	.14	.03	.21	.03	.05	.04	.03	.01	.01
Adolescence (n = 38)	1	Simple RT	.48
	2	SRC Compatible RT	1.63	12.82
	3	GNG Go RT	.24	1.40	.43
	4	SRC Incompatible RT	1.95	12.51	1.78	17.55
	5	DS Forward Total	.43	2.82	.09	2.45	4.70
	6	DS Backward Total	.37	2.87	.27	3.38	1.57	4.05
	7	RS Max Shape	.26	.95	.08	1.28	.73	.36	.58
	8	RS Max Location	.15	.73	.18	1.77	.42	.41	.10	.89
	9	2B Location Error Rate	.03	.14	.00	.22	.01	.10	.02	.06	.02
	10	2B Letter Error Rate	.03	.12	.02	.17	.07	.09	.03	.04	.01	.01
Young Adulthood (n = 37)	1	Simple RT	.36
	2	SRC Compatible RT	1.68	12.22
	3	GNG Go RT	.23	1.28	.37
	4	SRC Incompatible RT	1.68	11.51	1.41	13.16
	5	DS Forward Total	.43	2.68	.61	3.14	6.69
	6	DS Backward Total	.50	3.45	.41	3.08	2.83	5.59
	7	RS Max Shape	.25	1.67	.24	1.42	1.48	1.05	.97
	8	RS Max Location	.12	.85	.22	.83	.84	.97	.39	.99
	9	2B Location Error Rate	.02	.19	.00	.16	.10	.14	.04	.02	.02
	10	2B Letter Error Rate	.00	.01	.00	−.03	.10	.06	.02	.04	.00	.01