Group averaged ERP waveforms (−100 to 300 ms) measured from the P7 (LH) and P8 (RH) electrodes in TD controls, DD adults, and congenital prosopagnosic adults in response to faces and words. Whereas there is a greater N170 waveform for faces over the RH and words over the LH for the TD controls, the DD group showed neither a RH nor a LH advantage for faces and words, respectively, while the CP group showed the LH advantage for words no hemispheric advantage for faces. TD = typically developed; DD = developmental dyslexic; CP = congenital prosopagnosic.