Which Nixon would you buy a used car from?
Nixon's left+left at the far left.
The center image is the normal, original portrait.
Nixon's right+right is on the right.
The composite pictures were humorous. Although the individuals were easily recognizable, their facial expressions seemed to express exaggerated emotions, like anger, suspicion, or happiness -- and occasionally a look of total blankness. Even more interesting was the observation that the two sides of the same face were often so different. Why?
This exercise seemed to suggest that, while a handful of people have symmetrical faces, a vast majority of us do not. Also it raised the possibility that each side of our face could express different emotions at the same time! Subsequent research into facial expressions and the workings of the human brain has offered an interesting theory that not only explains this left and right difference in facial expressions, but could help us to understand our "other self."