Table 3.

DDM Parameters from the Best-Fitting Model

a. Constant DDM Parameter Estimates (Posterior Std)
Parameter				Mean
Boundary separation (a)				1.7 (0.09)
Bias (z)				0.54 (0.02)
Intertrial variance in non-decision time (st)				0.01 (0.0)
Intertrial variance in drift rate (sv)				0.008 (0.04)
Intertrial variance in bias (sz)				0.35 (0.03)
b. DDM Parameter Estimates (Posterior Std) that Vary by Condition
	Rule Block			Neutral Block
SOA	Expected	Unexpected	Nonword	Word	Nonword
Short
Drift rate (v)	2.8 (1.2)	2.6 (1.1)	−3.1 (1.2)	3.8 (1.2)	−3.8 (1.2)
Non-decision time (t)	0.464 (0.025)	0.440 (0.023)	0.496 (0.026)	0.417 (0.022)	0.441 (0.024)
Long
Drift rate (v)	2.8 (1.2)	2.2 (1.2)	−3.5 (1.1)	3.6 (1.1)	−3.8 (1.1)
Non-decision time (t)	0.373 (0.020)	0.441 (0.025)	0.433 (0.023)	0.383 (0.020)	0.414 (0.023)