Barbara

That does not mean that all people need to understand the details of most scientific discoveries and issues, but they do need to understand the nature of science, its power and limits, and they need to be able to discriminate science from pseudo-science

This is because they measure the structure of the brain rather than the brain activity that changes from moment to moment. In order to read out the current mental state of a person a measurement of their current brain activity is required

Brain activity can be measured using a number of techniques: electromagnetic brain activity signals can be measured using electroencephalography (EEG) and magnetoencephalography (MEG).