Although it was the beginning of psychology, it brought a lot of controversy. (Unit 8 Introduction.) The structuralists were influenced by the chemists who had discovered the elements in the periodic table. The essence of structuralism was to understand the elements of the mind, now called mental chemistry. (Hergenhahn & Henley, 2014.) Wilhelm Wundt was an important person in this school. He believed that the difference in reaction time would test the brain and measure decision making. (Unit 8, Introduction.) Wundt's version of the decision-making test often involves the use of introspection. A psychology based on introspection was difficult to defend. Two groups, Titchener and the Würzburg group, disagreed with each other. (Introspective video.) These two groups of structuralism have engaged in an argument with no proven solution. As a result, numerous new schools arose, each with a different problem with structuralism. Behaviorists were adamant that introspection would never become a science. The functionalists wanted a practical school, which focused attention on education and individual differences. Psychoanalysts were interested in helping people suffering from anxiety and depression. (Unit 8 Introduction.) These divergent views, along with others, lead to the death of structuralism. Now there are more than ten schools of psychology. (Introspection