“… 110 Strategies employed in the reviewed studies included adopting lower low-pass temporal filtering cutoff frequencies (e.g., 0.1 or 0.2 Hz) 28 , 32 , 42 , 44 – 47 , 51 , 53 , 55 , 60 , 61 in contrast to the recommended 0.5Hz, 111 various motion correction methods, 35 , 38 , 39 , 44 , 55 , 56 , 62 principal component analysis for signal component separation, 57 , 61 and pre-whitening and least-square regression-based approaches to eliminate intrinsic signal auto-correlations. 33 , 54 , 58 , 59 Some studies incorporated additional measures to account for systemic physiological effects, such as the inclusion of short-separation fNIRS channels. 49 , 54 However, this practice was not common, potentially due to constraints related to limited head space and the complexity of system setups necessitated by the integration of both fNIRS and iVR hardware.…”