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. Author manuscript; available in PMC: 2016 Apr 1.
Published in final edited form as: Neuroimage. 2015 Jan 3;109:35–49. doi: 10.1016/j.neuroimage.2014.12.072

Table 1.

Estimated group-level parameters for two drift diffusion models. All Trials model refers to the model with an fMRI slope metric regressed against drift rate. Drift rates for this model were estimated for three noise conditions (low, mid, high) and two stimulus conditions (face, house). SD indicates standard deviation of the parameter across all subjects. High Noise included the same regression, but for high-noise trials only. Drift rates for this model were estimated for accuracy (correct, error) and stimulus (face, house) conditions.

Model a ter z ster sv sz VFACE VHOUSE
LOW | COR MID | ERR HIGH LOW | COR MID | ERR HIGH
All Trials 3.54 0.84 1.80 0.34 0.28 0.08 2.12 0.56 −0.50 1.15 0.37 −0.06
(SD) 0.12 0.08 0.04 0.07 0.04 0.04 0.14 0.12 0.13 0.15 0.13 0.13
High Noise 3.97 1.22 1.93 0.47 0.05 0.07 1.80 −2.37 -- 1.86 −2.09 --
(SD) 0.19 0.12 0.06 0.10 0.04 0.07 0.17 0.21 -- 0.16 0.22 --