Table 5.

Hierarchical Regression Analyses of Item Recognition Task-related EEG (4–7 Hz) Predicting Academic Achievement, after Controlling for Verbal IQ and Baseline EEG

	R	R²	R²Δ	FΔ	F	β	t	sr²
*a. Reading Comprehension*
Step 1.	.28	.07			9.20^***
Verbal IQ						.28	4.24^***	.08
T Baseline EEG						−.08	−1.28	.01
Step 2.	.28	.07	.00	.22	6.18^***
Verbal IQ						.28	4.24^***	.08
T Baseline EEG						−.12	−1.18	.01
Item Recognition EEG						.05	.47	.00

*b. Reading Fluency*
Step 1.	.26	.07			6.21^**
Verbal IQ						.27	3.52^***	.07
T Baseline EEG						−.06	−.80	.00
Step 2.	.28	.08	.01	1.73	4.73^**
Verbal IQ						.26	3.44^***	.06
T Baseline EEG						−.17	−1.51	.01
Item Recognition EEG						.15	1.32	.01

*c. Calculation*
Step 1.	.27	.08			8.91^***
Verbal IQ						.26	3.98^***	.07
T Baseline EEG						−.13	−1.99^**	.02
Step 2.	.28	.08	.00	.56	6.11^***
Verbal IQ						.26	3.96^***	.07
T Baseline EEG						−.07	−.68	.00
Item Recognition EEG						−.08	−.75	.00

*d. Math Fluency*
Step 1.	.24	.06			6.65^**
Verbal IQ						.23	3.47^***	.05
T Baseline EEG						−.11	−1.68^*	.01
Step 2.	.25	.06	.00	.82	4.70^**
Verbal IQ						.23	3.46^***	.05
T Baseline EEG						−.04	−.37	.00
Item Recognition EEG						−.09	−.91	.00

Note:

^***

p ≤. 001

^**

p≤.01

p≤.05.

The p-values for the final step of the regressions were < .001, .003, < .001, and .001 for reading comprehension, reading fluency, calculation, and math fluency, respectively.