Table 1.

Results of simulation and chicken retinal experiments

Simulation experiment	$K_L$	$S_L$	$K_P$	$S_P$	Population response of RGCs
Natural stimuli	5.111	0.587	5.019	0.578	65% show negative response
Random checkerboard stimuli	1.308	0.418	1.499	0.319	72% show negative response

Chicken retinal experiment	$K_L$	$S_L$	$K_P$	$S_P$	Population response of RGCs
Natural stimuli	8.827	0.802	10.250	0.852	68% show negative response
Random checkerboard stimuli	3.780	0.777	3.500	0.802	73% show negative response

Results of the lifetime sparseness ($K_L$,$S_L$) and population sparseness ($K_P$,$S_P$) of the neuronal activities in response to natural and random checkerboard stimuli