. Author manuscript; available in PMC: 2012 Jan 1.

Published in final edited form as: J Exp Psychol Learn Mem Cogn. 2011 Jan;37(1):1–27. doi: 10.1037/a0021330

Table 7.

Experiment 2: Best-Fitting Parameters for the Mixed Serial/Parallel Model.

	Parameters
	σ _x	σ _y	D_x	D_y	+A	−B	k_s	k_p	μ _R	σ _R	m_σ	p_x	p_s	p_s-C
O1	0.37	0.59	0.10	0.14	6	5	31.08	91.77	361.9	314.4	0.13	0.98	0.91	0.27
O2	0.20	0.25	0.12	0.22	27	16	5.22	0.79	434.8	43.6	6.24	1.00	0.08	-
O3	0.11	0.10	0.30	0.43	3	5	26.92	68.75	450.0	128.5	8.09	0.46	0.85	-
O4	0.26	0.82	0.29	0.27	8	12	7.82	73.05	471.8	110.0	0.37	0.88	0.91	-

Note: σ_x, σ_y = perceptual standard deviations on each dimension; D_x, D_y = decision boundary locations on each dimension; +A, −B = random walk criteria; k_s, k_p = scaling constants for serial and parallel random walks; μ_R, σ_R = residual-time mean and standard deviation; m_σ = variance multiplier parameter; p_x = probability that dimension x is processed before dimension y; p_s = probability of serial processing on each trial. For participant O1, p_s-C = probability of serial processing for the contrast-category.