Table 1.
The published references for DPF values.
| References | Cortex | Subjects | Age | Wavelengths | S-D separation |
|---|---|---|---|---|---|
| van der Zee et al., 1992 | Temporal frontal | 10 adults, 10 Infants | 22~54 Y | 761 nm | 2.5 cm |
| Duncan et al., 1995 | Left forehead | 100 adults, 35 Infants | 21~ 9 Y and Infants | 690, 744, 807, 832 nm | >4 cm |
| Duncan et al., 1996 | Left forehead | 283 | 1 day ~50 Y | 690, 744, 807, 832 nm | 4.5 cm |
| Cooper et al., 1996 | Temporal frontal | 19 | 23~38 weeks | 730 and 830 nm | 4.9 cm |
| Kohl et al., 1998 | Right occipital | 10 | 23~40 Y | 700–1000 nm | 3 cm |
| Scholkmann and Wolf, 2013 | NA | NA | Applicable to all | Applicable to any | NA |