Psychology- the scientific study of the causes of behaviour: the application of the findings of psychological research to the solution of problems, psychology is the science of behaviour, psycho mind , logy science . Causal event- an event that causes another event to occur. Dualism- the philosophical belief that reality consists of mind and matter, human process a soul and free will. Model- a relatively simple system that works on known principles and is able to do at least some of the things that a more complex system can do. Empiricism- pursuit of truth through observation and experience. Materialism- the belief that reality can be known only through an understanding of the physical world, of which the mind is a part. James mill agreed with descartes" approach to understanding the human body, but disagreed the concept of an immaterial mind, in which the mind, no less than the body, is a machine and humans are no difficult from animals.