This document discusses the key components of communication models and advertising effectiveness research. It describes the basic communication model as having a message initiator, sender, receiver, medium, message, and feedback. It then focuses on issues of source credibility for both informal and formal sources as well as spokespersons. The document also examines how the target audience and their personal characteristics can impact communication effectiveness. Finally, it reviews methods for designing persuasive communications including segmentation, media strategy, message strategy, and the use of different emotional advertising appeals.