. Author manuscript; available in PMC: 2010 Jul 2.

Published in final edited form as: Psychol Aging. 2010 Jun;25(2):377–390. doi: 10.1037/a0018022

Table 3.

Parameter values from Experiment 3

	Parameter
Age and Session	a	z	s_z	ν₁	ν₂	ν₃	ν₄	η	T_er	s_t	dc	p_o
College
1	.140	.062	.085	.458	.363	.225	.076	.154	392	162	.021	.002
2	.127	.059	.077	.505	.319	.269	.091	.163	375	122	.033	.013
3	.114	.054	.057	.467	.395	.250	.076	.137	357	120	.037	.004
4	.109	.050	.059	.504	.400	.255	.083	.137	358	106	.046	.013
5	.109	.051	.060	.502	.401	.265	.104	.147	348	102	.037	.011
6	.100	.047	.064	.508	.413	.282	.090	.146	341	093	.047	.011
7	.109	.052	.068	.523	.410	.275	.099	.180	349	100	.047	.010
8	.105	.049	.060	.519	.417	.284	.101	.162	342	91	.050	.021
60–74
1	.207	.093	.061	.443	.327	.198	.068	.164	479	159	.025	.002
2	.201	.094	.042	.477	.354	.216	.069	.147	463	112	.036	.000
3	.200	.094	.041	.555	.425	.256	.090	.177	454	128	.041	.002
4	.209	.099	.050	.587	.461	.273	.098	.178	448	114	.047	.001
5	.207	.099	.050	.635	.492	.299	.100	.198	449	113	.047	.006
6	.211	.101	.060	.695	.534	.323	.105	.199	445	115	.056	.003
7	.221	.107	.055	.693	.547	.331	.113	.213	432	98	.044	.002
8	.206	.097	.056	.674	.528	.325	.108	.200	427	97	.053	.004

Note: a is boundary separation, z is starting point, s_z is the range in starting point variation, ν₁–ν₄ are the drift rates for the four difficulty conditions from easiest to hardest, η is the standard deviation in drift rates, T_er is the average non-decision component of RT, s_t is the range of variation in T_er, dc is the drift criterion, and p_o is the proportion of trials with response time contaminants.