In 1879, William Wundt (considered the father of clinical psychology) founded the first psychological laboratory at the University of Lepzig, in Germany. This is where psychology as an academic discipline was born. It transformed psychology from a philosophy to a science, and forever changed the study of human behavior.
Not everything can be directly observed in a laboratory. Human activities, such as, reasoning, creating, or dreaming are private; we assume they happen, but we can't see them. Because human beings are so complex and multi-layered, physiologists have theories for just about everything from learning to child development, from memory to mental illness. Personality theories try to explain why people are the way they are; development theories look at how children become adults. It is theorized that mental illness is a result of painful childhood experiences. Psychologists wonder and explore what types of childhood experiences have the most impact on people, and at what age does it actually make a difference.
Hypotheses that Psychologists present are predictions about what is expected to happen if a theory is true. If it is believed that a person's childhood has a major impact on adult