Differential psychology is a branch of science that studies psychological differences between individuals and groups of people, as well as the nature, sources, and consequences of these differences. The concept of differential psychology was introduced by V. Stern made his debut in his work “In the Psychology of Individual Differences: Ideas for Differential Psychology,” published in 1900. It is important to note that individual differences between people have been identified as a lesson since ancient times. Philosophers and scientists have drawn attention to the fact that all people are different and can be categorized in a certain way in relation to their psychological characteristics and behavior. V. Stern succeeded in bringing together the ideas available at the time (late nineteenth-early twentieth century) about the differences between people in a holistic concept. This has been made possible by the proliferation of the experimental approach in psychology, which involves measuring psychological markers and subsequent analysis of the data obtained. The subject of differential psychology is the study of the structure of individuality on the basis of identifying individual, stereotype, and collective differences between people through comparative analysis