A headpiece, acquisition device, system and method for making electroencephalography (EEG) measurements. The EEG headpiece fits, or adjusts to fit, on a person's scalp, each of a plurality of electrodes is located in the headpiece corresponding to selected respective positions on the scalp, the electrodes are electrically connected to at least one electrical transmitter, and the headpiece is attached to the scalp after the electrodes have been located in the headpiece.