This document summarizes four theories of audience:
1) The Frankfurt School viewed audiences as passive recipients of media messages.
2) Katz and Lazarsfield's Two Step Flow Theory proposed that opinion leaders influence others through interpersonal communication.
3) Katz and Blumler's Uses and Gratifications Theory found that audiences actively consume media to fulfill specific needs and desires.
4) David Morley's Nationwide Audience Theory described different ways audiences can interpret media messages based on their social position.