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. Author manuscript; available in PMC: 2009 Jun 8.
Published in final edited form as: Psychol Rev. 2009 Jan;116(1):59–83. doi: 10.1037/a0014086

Table 1.

Parameter Values for Experiment 1

Statistic Ter st σ Decay k Scale a LF
New μln 		LF
New σln 		HF
New μhn 		HF
New σhn 		HF
Old μho 		HF
Old σho 		LF
Old μlo 		LF
Old σlo
Fit to mean data 543 248 0.186 0.29 0.1 −0.47 0.44 0.00 0.62 1.08 0.95 1.70 1.13
Means over subjects 536 262 0.177 0.32 0.1 −0.44 0.48 0.00 0.63 1.05 0.96 1.64 1.07
SD over subjects 66 96 0.019 0.04 0.0 0.15 0.10 0.00 0.13 0.29 0.10 0.30 0.19
Monte Carlo means 541 249 0.178 0.29 0.1 −0.48 0.44 0.00 0.64 1.05 0.99 1.65 1.16
Monte Carlo SDs 2 6 0.002 0.00 0.0 0.02 0.01 0.00 0.03 0.05 0.05 0.06 0.06

Note. Ter is the mean duration of nondecision processes; st is the range of variation in the nondecision response time component; σ is the standard deviation in evidence accumulation; k is the decay coefficient; a is the scaling factor applied to the drift rates; LF denotes low frequency words; HF denotes high frequency words; μ and σ give the mean and standard deviation of the across-trial match distributions for each item type.