L. Ron Hubbard is very famous for Scientology and Dianetics. Hubbard publicised a psychological technique, "Dianetics", which is practised in his "Church of Scientology". Scientology was organized in a very different way from the decentralized Dianetics movement. The E-meter was not part of the early days of Dianetics and Scientology. One treatment method Hubbard drew from in developing Dianetics was abreaction therapy. Hubbard became the leader of a growing Dianetics movement. Hubbard later cited "Excalibur" as an early version of Dianetics. Hubbard played a very active role in the Dianetics boom, writing, lecturing and training auditors. Hubbard would later cite "Excalibur" as an early version of "Dianetics". Hubbard also faced other practitioners moving into leadership positions within the Dianetics community. Hubbard's supporters soon began to have doubts about Dianetics. Hubbard as an integral part of Dianetics, first introduced in 1950. Anderson conducted research about Dianetics and its early followers. Several famous individuals became involved with Dianetics. Many enthusiasts emerged to form groups to study and practice Dianetics.