Our emotional reactions to marketing cues are so powerful that some high-tech companies study mood in very small doses (in 1/30 of a second increments) as they analyze people’s facial reactions when they see ads or new products. They measure happiness as they look for differences between, for example, a true smile (which includes a relaxation of the upper eyelid) and a social smile (which occurs only around the mouth). Whirlpool used this technique to test consumers’ emotional reactions to a yet-to-be-launched generation of its Duet washers and dryers. The company’s goal: To design an appliance that will actually make people happy. Researchers discovered that even though test subjects said they weren’t thrilled with some out-of-the-box design options, such as unusual color combinations, their facial expressions said otherwise. Does the ability to study our emotional reactions at such a specific level give marketers an unfair advantage?