Table 2.

Log-likelihood gain on test data.

	NS	NS-LNP	NS-PSTH	Unexplained
All cells	0.036	0.05	0.043	0.87
ON	0.026	0.061	0.055	0.857
OFF	0.047	0.066	0.05	0.836
ON-OFF	0.039	0.037	0.029	0.895