Table 4.

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

	R	R²	R²Δ	FΔ	FΔ	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	.03	6.11^***
Verbal IQ						.28	4.23^***	.08
T Baseline EEG						−.10	−.90	.00
Temporal Memory EEG						.02	.16	.00

*b. Reading Fluency*
Step 1.	.26	.07			6.21^**
Verbal IQ						.27	3.52^***	.07
T Baseline EEG						−.06	−.80	.00
Step 2.	.27	.07	.00	1.00	4.47^**
Verbal IQ						.26	3.44^***	.06
T Baseline EEG						−.15	−1.28	.01
Temporal Memory EEG						.12	1.00	.01

*c. Calculation*
Step 1.	.27	.08			8.91^***
Verbal IQ						.26	3.98^***	.07
T Baseline EEG						−.13	−1.99^**	.02
Step 2.	.29	.08	.00	2.03	6.64^***
Verbal IQ						.26	3.98^***	.07
T Baseline EEG						−.01	−.07	.00
Temporal Memory EEG						−.15	−1.43	.01

*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	1.21	4.84^**
Verbal IQ						.23	3.47^***	.05
T Baseline EEG						−.02	−.14	.00
Temporal Memory EEG						−.12	−1.10	.01

Note:

^***

p ≤. 001

^**

p≤01

^**

p≤05.

The p-values for the final step of the regressions were < .001, .005, < .001, and .003 for reading comprehension, reading fluency, calculation, and math fluency, respectively.