Spike prediction coherence and NST standard deviation as a function of size of recent event history.

Two measures used to evaluate the determinism of spiking responses in point cell neuron models, given randomized initializations and recent event history. Spike prediction coherence (A), is calculated as the ratio of spiking responses squared plus the ratio of non-spiking responses squared. NST standard deviation (B) is calculated from the distribution of observed timings of spiking responses across multiple trials. Both measures demonstrate generally increasing determinism with more inputs, with spike prediction coherence converging faster than spike timing.