Say ‘e’


“[A series of experiments] show that positive emotion and cooler facial temperatures result when people saying the letter “e” or the sound “ah” over and over again, apparently because making these sounds requires a smile-like expression. These [experiments] also show that negative emotion (and hotter facial temperatures) result from repeating sounds like the letter O or the German vowel ü, apparently because making these sounds require a frown-like expression to pronounce. This effect was found to be equally strong in both German and American research subjects.