TABLE 4.

Best fit neurophysiological model for subtests of D-KEFS, Purdue, and Halstead.

	Best fit model	R2	Adj R2	F	p	Parameter	β	t	p
All
D-KEFS inhibition vs. color naming	Glx-only	0.43	0.40	15.27	0.0009*	Glx	0.51	3.91	0.0009*
Purdue assembly (Right)	GABA-by-Glx-by-CBF	0.49	0.29	2.44	0.08	GABA	−0.40	−0.52	0.61
						Glx	0.17	1.07	0.30
						CBF	0.02	0.63	0.54
						GABA⋅Glx	−0.13	−0.49	0.63
						GABA⋅CBF	0.04	0.40	0.69
						Glx⋅CBF	−0.02	−1.49	0.16
Halstead finger tapping (Right)	Glx-only	0.26	0.22	6.87	0.02*	Glx	1.62	2.62	0.02*
Younger
D-KEFS inhibition vs. color naming	GABA-by-Glx-by-CBF	0.96	0.89	13.78	0.03*	GABA	1.15	1.38	0.26
						Glx	0.19	1.10	0.35
						CBF	0.19	6.34	0.008*
						GABA⋅Glx	−0.86	−1.28	0.29
						GABA⋅CBF	0.67	6.29	0.008*
						Glx⋅CBF	−0.09	−3.06	0.05*
Purdue assembly (Right)	GABA-by-Glx	0.63	0.44	3.37	0.10	GABA	−2.39	−2.79	0.03*
						Glx	0.22	1.06	0.33
						GABA⋅Glx	−0.73	−1.76	0.13
Halstead finger tapping (Right)	CBF-only	0.34	0.26	4.09	0.08	CBF	−0.50	−2.02	0.08
Older
D-KEFS inhibition vs. color naming	Glx-only	0.29	0.22	4.02	0.07	Glx	0.48	2.01	0.07
Purdue assembly (Right)	GABA-by-Glx-by-CBF	0.82	0.60	3.74	0.08	GABA	0.38	0.54	0.61
						Glx	0.02	0.18	0.87
						CBF	0.06	2.37	0.06
						GABA⋅Glx	0.02	0.08	0.94
						GABA⋅CBF	−0.10	−0.90	0.41
						Glx⋅CBF	−0.05	−3.06	0.03*
Halstead finger tapping (Right)	None	−	−	−	−	−	−	−	−

β denotes the model coefficient, and F, t, R², Adj. R² and p denote standard statistical parameters for F-statistics, t-statistics, proportion of the variance, proportion of variance adjusted for number of predictors in the model and alpha threshold, respectively.

*Significant at p ≤ 0.05. Bolded text is to indicate significant or trending results.