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. 2015 Feb 5;8:18. doi: 10.3389/fpsyg.2015.00018

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Copyright © 2015 Nunez, Srinivasan and Vandekerckhove.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Graphical representation of Model 3. Drift rates δ_jk, diffusion coefficients ς_jk, and non-decision times τ_jk were assumed to vary over both conditions and participants. Each of these parameters are assumed to be drawn from normal distributions with means of the form α_k + x^⊺_jγ, where x_j is the vector of SSVEP responses of subject j, and with variances that did not vary across conditions. As an example, α_(τ)k is the condition effect on the non-decision time and γ_(τ) reflects the change in non-decision time (seconds) due to a one SSVEP unit difference across two participants.