Contemporary psychology is best defined as the science of studying mental processes and behavior. This discipline has a rich, complex history that spans centuries, but it was not until the 1800s that modern psychology began to develop. In 1879, Wilhelm Wundt established one of the first laboratories for experimental studies in Leipzig, Germany. His research focused on understanding how people think and feel through studying their thoughts and actions at different levels of consciousness. He called this “experimental” or “scientific” psychology, which he contrasted with what he called “philosophical” or “speculative” psychology. Keywords: Psychology, mental processes, behavior The field of psychology is vast and complex. Its history spans centuries, but modern psychology began to develop in the 1800s. Wilhelm Wundt established one of the first laboratories for experimental studies in Leipzig, Germany at the University of Ghent in 1879. His research focused on understanding how people think and feel by studying their thoughts and actions at different levels of consciousness. He called this “experimental” or “scientific” psychology which he contrasted with what he called “philosophical” or “speculative” psychology. Though there have been many other great contributors to psychological theory over time — among them Alfred Binet (1857-1911), Ivan Pavlov (18