[tps_title]10. Smile And (Half) The World Smiles With You[/tps_title]
As you’ll have noticed, though, not everyone does smile back. Hinsz and Tomhave (1991) wanted to see what proportion of people would respond to a smile aimed at them with their own smile. Their results suggest around 50% of people reciprocate. In comparison almost no one responds to a frown with their own frown. Smiling at a stranger and getting a smile back is a great feeling after all.