Table 2.

Linear regression analysis of the spike counts evoked by Natural against the spike counts evoked by stimulus combinations that sum to Natural.

Components	Noise	Main	Intercept	MainBa	Echo	Intercept	MainEb	Background	Intercept	Back	Echo	Main	Intercept
Sub-populations
All neurons
Weights	0.46	0.22	0.23	0.46	0.29	0.23	0.44	0.19	0.25	0.18	0.18	0.21	0.31
Correlation coefficient	ΔR2 = 0.37, F(1,320) = 68, p≪0.01			ΔR2 = 0.34, F(1,215) = 43, p≪0.01			ΔR2 = 0.35, F(1,278) = 85, p≪0.01			ΔR2 = 0.27, F(1,215) = 27, p≪0.01
2<BF<7 kHz
Weights	0.37	0.22	0.28	0.42	0.23	0.25	0.59	0.17	0.21	0.16	0.23	0.21	0.32
Correlation coefficient	ΔR2 = 0.35, F(1,186) = 44, p≪0.01			ΔR2 = 0.43, F(1,159) = 56, p≪0.01			ΔR2 = 0.41, F(1,180) = 65, p≪0.01			ΔR2 = 0.35, F(1,159) = 38, p≪0.01
BF<2 or BF>7 kHz
Weights	0.56	0.19	0.16	0.44	0.07	0.25	0.24	0.5	0.17	0.34	0.04	0.14	0.26
Correlation coefficient	ΔR2 = 0.38, F(1,133) = 39, p≪0.01			ΔR2 = 0.10, F(1,55) = 0.65, n.s.			ΔR2 = 0.29, F(1,97) = 14, p≪0.01			ΔR2 = 0.11, F(1,55) = 1.2, n.s.

^aMain + Background.

^bMain + Echo.