Psychology has gone through many changes since it was born. We can trace the beginnings of psychology back to at least 300 BC, when Aristotle, the Greek philosopher, formed and taught theories related to learning, memory, motivation, emotion, perception, and personality (Myers, D., 1999 ). Of course, not all of his theories were correct. But, as Myers (1999) said, “we give credit to Aristotle for asking the right questions.” Psychology as we know it today began with Wilhelm Wundt, who conducted the first psychological experiment and the first psychological institute. Psychology has evolved through many different theories and schools of thought to become what we know as psychology today. Structuralism Edward Bradford Titchener was a professor at Cornell University in the early 1900s. He came to the United States from Germany. Although he claimed to follow Wundt's psychological system, his approach was something completely different. Titchener called his system "structuralism" and insisted that it was the same as Wundt's, although they were not at all similar. Introspection was studied in depth by Titchener and his students and followers to understand the basic elements of consciousness. Titchener's students were asked, and many agreed, to perform outrageous experiments on themselves, such as swallowing a rubber tube into which hot and then cold water would be poured. The purpose of these experiments was to record their “introspections,” or their thoughts and feelings during the experiment. (Schultz & Schultz, 2012). The main goal of structuralism was to break down mental processes into basic components in order to understand the basic elements of consciousness. (Cherry, 2014). Functionalism Charles Darwin and his theory of evolution...... half of the article...... stated at the beginning, psychology could not be what we know today as psychology without all the different theories and schools of thought throughout history. All of these schools of thought have contributed to today's psychology, and we can see parts of each of them in contemporary psychology. Works Cited Schultz, D. P. & Schultz, S. E. (2012). A history of modern psychology. Belmont, CA.:Wadsworth, Cengage LearningMyers, D. (1999). Exploring psychology. New York, NY: Worth Publishers Cherry, K. (2014). Origins of psychology. Retrieved from psychology.about.com/od/historyofpsychology/a/psychistory.htmCherry, K. (2014). Structuralism and functionalism. Retrieved from psychology.about.com/od/historyofpsychcology/a/structuralism.htm Cherry, K. (2014). What is Behaviorism?, Retrieved from psychology.about.com/od/behavioralpsychology/f/behaviorism.htm