. Author manuscript; available in PMC: 2019 Oct 1.

Published in final edited form as: Jpn Psychol Res. 2018 Jul 19;60(4):347–373. doi: 10.1111/jpr.12206

Table 4.

Summary of the steps adopted for the fNIRS data pre-processing.

First author	fNIRS data pre-processing
First author	DPF	Motion artifact correction	Filtering	Additional steps
Atsumori et al. 2010	- N/A	- Not performed	- Not performed	- Baseline correction
Balardin et al., 2017	- Not reported	- Not performed	- BP filter [0.01 0.2] Hz	- Down-sampling to 1 Hz
Doi et al. 2013	- Not reported	- Not performed	- LP filter 0.05 Hz	- Baseline correction
Maidan et al. 2016	- Not reported	- Wavelet-based	- BP filter [0.01 0.14] Hz	- CBSI; Baseline correction
McKendrick et al. 2016	- Not reported	- Not performed	- LP FIR filter, 20^th order, 0.1 Hz	- Baseline correction
McKendrick et al. 2017	- Not reported	- Not performed	- LP FIR filter, 20^th order, 0.1 Hz	- Baseline correction
Mirelaman et al. 2014	- Not reported	- Not performed	- LP FIR filter, 0.14 Hz	- Baseline correction
Nieuwhof et al. 2016	- Constant (6.0)	- MARA	- LP Butterworth filter, 0.1 Hz	- Baseline correction
Pinti et al. 2015	- N/A	- Wavelet-based	- BP Butterworth filter, 3^rd order, [0.008 0.2] Hz	- Down-sampling to 1 Hz; CBSI
Takeuchi et al. 2016	- N/A	- Not performed	- Moving average - BP filter [0.01 0.5] Hz	- Baseline correction

Note. Abbreviations: DPF = differential path length factor; BP = Band-pass; LP = low-pass; CBSI = correlation-based signal improvement; FIR = finite impulse response; MARA = movement artifact reduction algorithm.