Final answer:
George Herbert Mead and Herbert Blumer are the two primary figures associated with the development of Symbolic Interactionism, with Blumer being the one to formally outline its core principles.
Step-by-step explanation:
The two main sociologists associated with Symbolic Interactionism are George Herbert Mead and his student, Herbert Blumer. Mead is considered a founder of this sociological perspective but, interestingly, he never published his work on it. Blumer, who studied under Mead, went on to coin the term 'symbolic interactionism' and developed its core premises. He highlighted that humans interact with various entities based on the meanings they ascribe to them, and these meanings are derived from interactions within society. Blumer's approach to symbolic interactionism suggests that personal interpretation plays a significant role when dealing with things in specific circumstances.