Table 2.

Estimates of fixed effects for response times and accuracy

Dependent variable	Effect	Estimate (SE)	df	t	p	95% CI
Time	Intercept	4989.03 (289.60)	169.51	17.22	< .001	[4421.41, 5556.65]
	Retr	1811.13 (117.80)	592.00	15.37	< .001	[1580.24, 2042.02]
	Subst	278.27 (102.02)	592.00	2.72	0.006	[78.31, 478.23]
	Retr x Subst	− 611.02 (155.84)	592.00	− 3.92	< .001	[− 916.47, − 305.57]
	Subst in Retr	− 332.8(107.9)	148.00	− 3.08	0.002	[− 544.28, − 121.32]
	Subst in No-Retr	278.3(112.3)	296.00	2.47	0.013	[58.19, 498.41]
	Cattell	− 57.46 (19.84)	148.00	− 2.89	0.004	[− 96.35, − 18.57]
	Math fluency	− 26.84 (3.59)	148.00	− 7.46	< .001	[− 33.88, − 19.80]
Accuracy	Intercept	88.84(2.69)	265.20	33.00	< .001	[83.57, 94.11]
	Retr	− 26.22 (3.20)	592.00	− 8.19	< .001	[− 32.49, − 19.95]
	Subst	0.74 (0.93)	592.00	0.80	0.422	[− 1.08, 2.56]
	Reading Comp	− 0.10 (0.09)	243.54	− 1.11	0.266	[− 0.28, 0.08]
	Retr x Subst	− 14.32 (1.42)	592.00	− 10.03	< .001	[− 17.10, − 11.54]
	Subst in Retr	− 13.57(1.33)	148.00	− 10.15	< .001	[− 16.18, − 10.96]
	Subst in No-Retr	0.74(0.27)	296.00	2.68	0.007	[0.21, 1.27]
	Retr x Reading Comp	0.49 (0.11)	592.00	4.41	< .001	[0.27, 0.71]
	Cattell	0.77 (0.14)	148.00	5.16	< .001	[0.50, 1.04]
	Math fluency	0.06 (0.02)	148.00	2.63	0.009	[0.02, 0.10]
	Vocabulary	− 0.23 (0.09)	148.00	− 2.45	0.015	[− 0.41, − 0.05]