Brain-imaging headband measures how our minds mirror a speaker when we communicate


Drexel University biomedical engineers and Princeton University psychologists have used a wearable brain-imaging device called functional near-infrared spectroscopy (fNIRS) to measure brain synchronization when humans interact. fNIRS uses light to measure neural activity in the cortex of the brain (based on blood-oxygenation changes) during real-life situations and can be worn like a headband.