Table 1.

Parameter values for Models V1 and V2 (“drift” models) and Models B1 and B2 (“threshold” models) averaged across participants in data sets I, II, III, and IV.

	Data set	s	A	bC-L	bI-L	bC-H	bI-H	Δb	t0	vC-L	vI-L	vC-H	vI-H	Δv
Model V1	I	0.18	0.14		0.48			–	0.14	0.79	0.64	0.77	0.66	–
	II	0.15	0.09		0.36			–	0.13	0.78	0.63	0.75	0.65	–
	III	0.13	0.09		0.37			–	0.08	0.73	0.58	0.71	0.60	–
	IV	0.17	0.15		0.46			–	0.08	0.77	0.62	0.75	0.64	–
Model V2	I	0.18	0.14		0.48			–	0.14	0.79	0.64	–	–	0.02
	II	0.15	0.09		0.36			–	0.13	0.78	0.63	–	–	0.02
	III	0.13	0.10		0.37			–	0.08	0.73	0.59	–	–	0.02
	IV	0.17	0.15		0.46			–	0.08	0.77	0.62	–	–	0.02
Model B1	I	0.19	0.16	0.43	0.48	0.41	0.47	–	0.19	0.77	0.70	–	–	–
	II	0.17	0.10	0.32	0.36	0.33	0.35	–	0.17	0.76	0.70	–	–	–
	III	0.14	0.10	0.36	0.37	0.37	0.37	–	0.11	0.73	0.61	–	–	–
	IV	0.19	0.18	0.42	0.47	0.43	0.47	–	0.13	0.77	0.69	–	–	–
Model B2	I	0.19	0.17	0.43	0.48	–	–	0.01	0.20	0.78	0.70	–	–	–
	II	0.17	0.10	0.32	0.37	–	–	0.01	0.17	0.76	0.69	–	–	–
	III	0.14	0.11	0.36	0.37	–	–	0.01	0.12	0.75	0.62	–	–	–
	IV	0.18	0.20	0.43	0.47	–	–	0.01	0.14	0.79	0.70	–	–	–

C, Con, I, Incon; H, High, L, Low; s, standard deviation; A, upper limit of the start-point distribution; b, response threshold; t₀, non-decision time; v, drift rate. In Model B2, b_Incon-High = b_Incon-Low + Δb and b_Con-High = b_Con-Low − Δb. In Model V2, v_Incon-High = v_Incon-Low − Δv and v_Con-High = v_Con-Low + Δv.