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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 1.

Linear Ballistic Accumulator Parameter Estimates

Data Set Baseline (A) Threshold (b) Drift Rate (v) Nondecision Time (T0)
Accurate Medium Fast
Monkey S (sessions) 30 ± 8.1 277 ± 4.2 144 ± 14.4 135 ± 4.7 0.55 ± 0.01 81 ± 8.4
Monkey Q (sessions) 64 ± 8.1 320 ± 4.0 121 ± 10.7 105 ± 4.9 0.59 ± 0.01 138 ± 7.1
Population 85 325 149 141 0.57 101

Best-fitting parameters for LBA model with baseline (A), drift rate (v), and nondecision time (T0) shared and threshold (b) variable across SAT conditions. Session fits are the mean ± SE of parameter values estimated separately for each session for a given monkey. Population fit is estimated across all trials, sessions, and monkeys. Units for A, b, arbitrary units of activation; v, activation/ms; T0, ms.