Final answer:
Charles Horton Cooley and George Herbert Mead are the primary theorists behind the Looking Glass Self theory, with Cooley introducing the concept and Mead expanding on it.
Step-by-step explanation:
The theorists credited with developing the Looking Glass Self theory are Charles Horton Cooley and George Herbert Mead. Charles Horton Cooley introduced the idea in his 1902 work, maintaining that individuals build their sense of self through their understanding of how others perceive them. George Herbert Mead expanded upon Cooley’s ideas by investigating how the self is developed through social interaction, emphasizing the role of 'significant others' and 'generalized others' in this process. Although not directly involved in forming the Looking Glass Self theory, Erving Goffman further developed these concepts through his work on dramaturgical analysis, which also focused on the self and social interactions.