I am mainly interested in how humans perceive and recognize faces. To find out, I use event-related brain potentials (ERPs). ERPs can be calculated from the human encephalogram (EEG) – small voltage changes recorded from the scalp, which reflect electrical activity of the brain. ERPs have an excellent temporal resolution, and are therefore particularly suited to test at which point in time particular perceptual and cognitive processes occur. This, in turn, can be used to to test psychological theories about how the mind works, and more specifically, how face recognition is achieved.