de Gelder, Pourtois & Weiskrantz (2002) PNAS March 19, 2002 vol. 99 no. 6 4121-4126
Unconscious recognition of emotional facial expressions.
Auditory Evoked Potential (AEP) of blindsight patients GY and DB are recorded. Happy face (visual) + happy voice -> high AEP Angry face (visual) + angry voice -> high AEP mismatch -> low AEP So AEP tests for emotional congruency
Same result for visual presentation to blind area! But not for pictures (e.g. car crashes)