How are brain waves measured?
Electroencephalography
EEG can detect covert processing (i.e., processing that does not require a response)[27]
EEG can be used in subjects who are incapable of making a motor response[28]
Some ERP components can be detected even when the subject is not attending to the stimuli
Unlike other means of studying reaction time, ERPs can elucidate stages of processing (rather than just the final end result)[29]
EEG is a powerful tool for tracking brain changes during different phases of life. EEG sleep analysis can indicate significant aspects of the timing of brain development, including evaluating adolescent brain maturation.[30]
In EEG there is a better understanding of what signal is measured as compared to other research techniques, i.e. the BOLD response in MRI.