Some components of facial expressions of emotion appear to be governed biologically, while others are culturally influenced. The left side of the face appears to be more expressive of emotions, is more uninhibited, and displays culture-specific emotional norms. The right side of face, on the other hand, appears to be less susceptible to cultural display norms and exhibits more universal emotional signals. (Mandala, Manas K., and Nalini Ambady. Laterality of facial expressions of emotion: Universal and culture-specific influences. Behavioural Neurology 15 (2004) 23–34 23 IOS Press. Elenbein, H. A., et al. "Hemifacial differences in the in-group advantage in emotion recognition," Cognition and Emotion (2003), in press.)