Table 2.

Means (first lines) and standard deviations (second lines) for parameters from each experiment for the η model. a is the boundary separation, T_er is the mean non-decision time, e₁ is the scaling parameter for across-trial variability in drift (Equation 2), s_z is the range of the across-trial variability of the starting point, p_z is the proportion of uniformly distributed contaminant responses (Ratcliff & Tuerlinckx, 2002 for details and parameter recovery), s_t is the range of the across-trial variability in non-decision time, d₁ is the scaling parameter for drift rate (Equation 1), and p is the exponent in the transformation function used for Experiment 5.

Expt.	a	Ter	e1	sz	pz	st	d1	p
1	0.124	0.444	0.264	0.078	0.001	0.214	3.647	-
	0.014	0.049	0.136	0.039	0.00	0.064	1.202	-
2	0.104	0.395	0.246	0.075	0.001	0.195	3.153	-
	0.021	0.051	0.137	0.028	0.00	0.08	0.9	-
3	0.094	0.468	0.423	0.058	0.001	0.259	4.884	-
	0.016	0.049	0.16	0.031	0.00	0.06	1.577	-
4	0.129	0.488	0.285	0.099	0.001	0.319	0.371	-
	0.024	0.058	0.153	0.024	0.00	0.089	0.158	-
5	0.119	0.409	0.259	0.069	0.007	0.189	3.546	-
	0.016	0.046	0.158	0.045	0.024	0.055	1.311	-
5-P	0.123	0.410	0.196	0.072	0.008	0.193	5.616	0.577
	0.027	0.045	0.152	0.050	0.024	0.058	3.141	0.343