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. 2014 Oct 21;8:840. doi: 10.3389/fnhum.2014.00840

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Copyright © 2014 Rao, Motes and Rypma.

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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Examples of regressors created for the amplitude modulated linear deconvolution of the time-series. Data are based on a single run for one study participant. (A) The canonical HRF model was first created to obtain estimates of DSVT-related percent signal-changes. A gamma-variate function was convolved with trial onset times (for correct responses only). (B) Each gamma-variate function in the model HRF was scaled based on corresponding standardized trial-RTs [i.e., log(RT)]. (C) The RT-Modulated HRF model was regressed on the HRF model to remove the canonical HRF effects and obtain the RT model time-series. See “Materials and Methods” section for equations.