Answer:
EEG
Explanation:
EEG: The term EEG is also referred to as an electroencephalogram which is defined as a particular test that detects the electrical activities in an individual's brain through small metal discs i.e, electrodes that are being attached in his or her scalp.
The brain cells of a person are being communicated through electrical impulses and are considered to as active every time even when the person is sleeping. The activity of the brain cells creates a wavy line on the EEG recording device.
In the question above, the researchers will use EEG.
