2.2. Data Collection
22-channel NIRSport system (NIRX Medical Technologies, LLC, Berlin,
Germany) consisting of eight near-infrared light sources and seven
detectors was used to collect the hemodynamic activity of the prefrontal
cortex of the subjects. The source-detector separation was 3 cm, and the
sampling rate was 7.8125 Hz. Prefrontal cortex coverage of the fNIRS
probe was computed with the NIRS_SPM toolbox (Jang et al., 2009; Singh
et al., 2005; Ye et al., 2009) and can be seen in Figure 1 (adapted from
Mutlu et al., 2020).