Humans experience a range of emotions in response to products and experiences on a daily basis. Shoppers may get excited for certain brands and then overwhelmed by choices. Audience members may oscillate between apathy and engagement during performances. Children can become frustrated, bored, or entertained while learning a new subject. Using wearable stress sensors, analytics, and other technologies, MIT Media Lab spinout mPath is able to pinpoint the exact moment consumers feel these subconscious responses.