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Examples of motion artifacts (highlighted in pink for the parameters used in stage 1 and yellow for the revised parameters) present during a segment of the time series for one channel for one participant. The red line shows the 690-nm wavelength, whereas the 830-nm wavelength is shown in blue. Vertical lines depict the onset of a trial (i.e., time point 0). The bottom panel shows an excerpt of this participant’s behavior while completing the task.
