Table 1.
Parameter ranges (Study 1) and means and standard deviations (Study 2) used for generation of parameter sets.
| Parameter | Study 1: ranges | Study 2: M(SD) | ||
|---|---|---|---|---|
| Minimum | Maximum | Lexical decision task | Recognition memory task | |
| a | 0.5 | 2.0 | 1.42 (0.32) | 1.60 (0.36) |
| ν | −4.0 | 4.0 | − | − |
| ν0 | –2.35 (1.0)a | –4.01 (1.13) | –3.07 (1.14) | |
| ν1 | 2.00 (1.0)a | 3.10 (1.11) | 2.44 (1.20) | |
| t0 | 0.2 | 0.5 | 0.48 (0.04) | 0.61 (0.05) |
| Zr | 0.3 | 0.7 | 0.53 (0.06) | 0.55 (0.08) |
| Sν | 0.0 | 1.0 | 1.34 (0.64) | 1.41 (0.83) |
| St0 | 0.0 | 0.2 | 0.15 (0.05) | 0.17 (0.08) |
| Szr | 0.0 | 0.5 | 0.37 (0.25) | 0.15 (0.22) |
Parameter sets of Study 1/Study 2 were created on the basis of a uniform distribution/multivariate normal distribution, respectively. Fast-dm uses a diffusion coefficient of 1. For comparison with parameters used in studies with diffusion coefficient 0.1 multiply a, ν, zr, sν, and szr by 0.1.
a
The drift rates in the two-drift design were created on the basis of a multivariate normal distribution with the given means and standard deviations.