INTRAPERSONAL Communication that center on one person where the speaker acts as both the sender and the receiver of the action INTERPERSONAL Communication between and among people and establishes personal relationship between and among them. DYAD Occurs between two people SMALL GROUP Involves at least 3 but not more than 12 people engaging in face-to-face interaction to achieve a desired goal PUBLIC Require a communicator to deliver message in front of a group of people MASS Takes place through television, radio, newspapers, magazines, books, billboards, internet, and other types of media