fNIRS stands for functional near-infrared spectroscopy and is a brain imaging technique capturing the relative concentration of oxygenated and deoxygenated haemoglobin in different parts of the brain

The device that was used in this research is the Artinis Octamon+ shown in the image below.

Functional near-infrared spectroscopy ( fNIRS )

One of the main advantages of this device is its portability, allowing for measurements to be taken in more naturalistic environments. It has a total of 8 channels that can be moven in multiple locations on the headcap. Two short separation channels can be added as well.

Each channel emitts light at 760 and 850 nm and the sampling rate can go up to 50 Hz. The optode distance is about 30-35 mm and 10 mm for the short separation channels.