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. Author manuscript; available in PMC: 2008 May 29.
Published in final edited form as: Cogn Psychol. 2006 Aug 4;53(3):195–237. doi: 10.1016/j.cogpsych.2005.10.002

Table 3.

Mean drift rates and accumulation rates for the diffusion models and leaky competing accumulator models

Model v1 v2 v3 v4 v5 v6 v7 v8 Drift criterion on response signal trials
Diffusion partial 0.481 0.394 0.275 0.118 −0.019 −0.164 −0.287 −0.359 0.020
Diffusion guess 0.504 0.416 0.300 0.146 −0.007 −0.180 −0.315 −0.391 −0.059
LCA partial 0.869 0.803 0.722 0.597 0.462 0.323 0.221 0.149 0.015
LCA guess 0.995 0.948 0.811 0.658 0.494 0.314 0.212 0.147 −0.026

Note that the drift and accumulation rates are estimated for the regular RT conditions and the drift criterion values are added to drift rates to reflect bias differences between the two procedures.