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. Author manuscript; available in PMC: 2013 Nov 8.
Published in final edited form as: Neuron. 2012 Nov 8;76(3):616–628. doi: 10.1016/j.neuron.2012.08.030

Table 2.

Integrated Accumulator Parameter Estimates

Data Set Baseline (A) Integrated Threshold (b′) Drift Rate (v) Nondecision Time (T0) Leak (τ) Between-Trial Variability of Drift Rate (s)
Accurate 149 25,406 0.74 273 115 0.27
Neutral 290 25,406 0.83 99 115 0.27
Fast 328 25,406 0.92 112 115 0.27

Best-fitting parameter estimates for iA model with A, v, and T0 free to vary across conditions and b and t shared. Parameter s was fixed. Units for A, b′, arbitrary units of activation; v, s, activation/ms; T0, τ ms.