摘要：AbstractIn the article difference between dialectical and formal logic of understanding the process of child development is shown. The research was aimed at comparison of the development of dialectic and formal logic's structures in senior preschoolers (N=69, M=81 months). To assess the developmental state of dialectic structures the Cycles test was designed and used. Results showed that development of dialectics and formal logic can be viewed as a development of two separate cognitive processes.
