Psychology (or psychology) is the academic and applied study of behavior, cognition, and the associated mechanical sciences. Psychology usually studies humans, but it can sometimes be applied to non-humans, such as animals or intelligent systems. Psychology also refers to the application of this knowledge to various areas of human activity, including the problems of individuals in daily life and the treatment of mental illness. In short, psychology is the scientific studies of behavior, mind, thinking and personality, and it can be defined as: “the scientific study of the behavior of living organisms, especially humans, with the aim of reaching an understanding, interpretation, prediction and control of this behavior.” Just as it is one of the important sciences recently, and they did not expand in it in the past, and this science is not limited to one branch, but rather has several branches and sections. In addition, it is an interesting science, although its study may not be easy, and this science helps in knowing the types of different personalities.