 However, since rise of Neopaganism, Berger and Ezzy explain that, "As there is no central beaurocracy or dogma to determine authenticity, an individual's self-determination as a Witch, Wiccan, Pagan or Neopagan is usually taken at face value".Ezzy argues that practitioner's worldviews have been neglected in many sociological and anthropoloical studies and that this is because of "a culturally narrow understanding of science that devalues magical beliefs".Mauss argues that the powers of both specialist and common magicians are determined by culturally accepted standards of the sources and the breadth of magic