Answer
C. S. Peirce's semiotics, communication theory and cybernetics informed Jakobson's investigation methods. Peirce believed that the meaning of a sign is determined by its relationship to other signs in the system, and that communication is a process of transmitting and interpreting signs. Jakobson's work on language and communication was heavily influenced by Peirce's ideas, and he used Peirce's semiotic theory to develop his own model of communication.