Abstract:
The author formulates his own theory of derivating the developmental changes just to
explain the problem of progressive changes sources. His theoretical attitude is based on the
assumption, that human development is created in subjective activity. The author accepts interactional model of the creative process. The efficiency of the creative process depends on two parameters: (1) fluency of "trial structures" creating, and (2) efficiency of merging the contents. The author also describes the empirical consequences of his model
