Qualitative speed-accuracy tradeoff effects that cannot be explained by the diffusion model under the selective influence assumption.

ABSTRACT: It is often thought that the diffusion model explains all effects related to the speed-accuracy tradeoff (SAT) but this has previously been examined with only a few SAT conditions or only a few subjects. Here we collected data from 20 subjects who performed a perceptual discrimination task with five different difficulty levels and five different SAT conditions (5000 trials/subject). We found that the five SAT conditions produced robustly U-shaped curves for (i) the difference between error and correct response times (RTs), (ii) the ratio of the standard deviation and mean of the RT distributions, and (iii) the skewness of the RT distributions. Critically, the diffusion model where only drift rate varies with contrast and only boundary varies with SAT could not account for any of the three

SUBMITTER: Rafiei F 

PROVIDER: S-EPMC7794484 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature