In the fields of neuroscience, behavioral psychology, and evolutionary psychology, with specific reference to intimate relationships, romantic relationships, or friendships, interpersonal chemistry is a reaction between two people or the spontaneous reaction of two people to each other, especially a mutual sense of attraction or understanding. In a colloquial sense, it is often intuited that people can have either good chemistry or bad chemistry together. Good chemistry is thought to be associated with or the result of favorable human bondings and associations. Other related terms are team chemistry, a phrase often used in sports, and business chemistry, as between two companies. When job-hunting, the greatest credentials in the world are not enough, i.e. according to the research of career expert Debra Feldman, "personality and interpersonal chemistry, that essential feeling of trust, plays a critical role in hiring decisions."