Table 4:

Experiment 2 P1 and N1 multilinear regression analysis

Model	df	P1					N1
R²	MSE	F	p	Power	R²	MSE	F	p	Power
Contrast energy	1,94	0.002	1.56	0.17	0.69	0.07	3.0e-5	2.05	0.0028	0.96	0.05
Spatial coherence	1,94	0.002	1.56	0.20	0.65	0.07	0.0005	2.05	0.05	0.82	0.06
Naturalness rating	1,94	0.019	1.53	1.83	0.17	0.27	0.018	2.01	1.70	0.19	0.25
Contrast energy, spatial coherence	2,93	0.002	1.58	0.11	0.89	0.07	0.002	2.07	0.08	0.93	0.07
Contrast energy, naturalness	2,93	0.021	1.54	0.97	0.38	0.22	0.018	2.04	0.84	0.43	0.19
Spatial coherence, naturalness	2,93	0.028	1.54	1.24	0.29	0.27	0.018	2.04	0.84	0.43	0.19
Contrast energy, spatial coherence, naturalness rating	3,92	0.028	1.55	0.87	0.46	0.24	0.018	2.06	0.56	0.65	0.17
Fourier intercept	1,94	0.009	1.55	0.87	0.35	0.15	0.002	2.05	0.21	0.65	0.07
Fourier slope	1,94	0.017	1.54	1.67	0.19	0.25	0.001	2.05	0.10	0.75	0.06
Openness rating	1,94	0.008	1.54	0.78	0.38	0.15	0.010	2.03	0.99	0.32	0.17
Fourier intercept, fourier slope	2,93	0.019	1.54	0.92	0.40	0.21	0.003	2.07	0.12	0.89	0.08
Fourier intercept, openness rating	2,93	0.012	1.56	0.58	0.56	0.14	0.020	2.03	0.93	0.40	0.21
Fourier slope, openness rating	2,93	0.020	1.54	0.96	0.39	0.22	0.015	2.04	0.71	0.49	0.17
Fourier intercept, Fourier slope, openness rating	3,92	0.024	1.55	0.75	0.52	0.21	0.021	2.05	0.65	0.59	0.19
Contrast energy, spatial coherence, Fourier intercept, Fourier slope	4,91	0.032	1.56	0.75	0.56	0.25	0.005	2.11	0.11	0.98	0.07
Naturalness rating, openness rating	2,93	0.045	1.51	2.17	0.12	0.45	0.021	2.03	0.974	0.38	0.22
All combined	6,89	0.075	1.53	1.21	0.31	0.48	0.036	2.09	0.55	0.77	0.23