ABSTRACT
The study of complexity stimulated the development of an interdisciplinary field, science of complexity, due to various aspects of complexity being studied in different fields of science.
The main purpose of the study in this field is the development of formalized and quantitative methods of evaluation of a complex systems structure. In different fields, scientists emphasize different aspects of complexity. In mathematics, there is the computational complexity theory. The study of complexity attracts the attention of economists, biologists, and other scientists. For such areas of science as psychology, ergonomics, economics, and human-computer interaction (HCI), psychological complexity is especially important (Bedny and Karwowski, 2007; Thomas and Richards, 2012). It is important to understand that what is objectively complex for some may not be equally complex for other subjects.
