This document discusses several theories of how audiences interact with and interpret media. It outlines the hypodermic syringe theory from the 1920s-1930s which viewed audiences as passive receivers of media messages. The 2-step flow theory from the 1940s-1950s proposed that opinion leaders first receive information from media and then pass it along to others. Uses and gratifications theory from the 1960s recognized that audiences actively seek out media to fulfill certain needs like diversion, relationships, identity and surveillance. Later theories like David Morley's in the 1980s suggested audiences can have dominant, negotiated or oppositional readings of media texts.