Communicating the unknown: Using a concept assessment to characterise student misunderstanding. J.K. Matthaean believes that the essence of the basic problem. The Handbook on Cults and Sects in America, edited by D.G. Bromley and J.K. Hadden, 75-97. Cite this article as: Abraham, J.K., Meir, E., Perry, J. Since the introduction of vaccination, myths and misconceptions regarding.