Previous research has demonstrated a different psychophysiological response of schizophrenic patients depending on whether their key relative was rated high or low on Expressed Emotion (EE). A case assessment is described in which a young man suffering from schizophrenia, who lived with both a high EE and a low EE parent, was tested psychophysiologically in their presence using an ABAC design. The patient demonstrated a significantly higher amount of spontaneous activity in skin conductance level when the high EE parent was present. The high EE parent also demonstrated a greater perceived inability to cope, and a higher level of personal distress.