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Dependence of retinal precision on stimulus contrast. (A) The temporal jitter τ. (B) The Fano factor F. (C) The firing fraction α. All data (•) are plotted as mean ± SEM of a population of salamander ganglion cells (fast OFF-type), pooled over 50/6, 15/1, 31/3, 40/4, 31/3, and 32/3 cells/retinae at each contrast value ranging from highest to lowest. Solid lines are one-parameter curve fits proportional to Contrast−0.5.
