Representation Theory, Hypodermic Needle Theory

Representation Theory: The theory explains how it's the reads point of view maybe very different from each other.

Hypodermic Needle Theory: The theory how the media can impact the readers point of view on a subject.

The difference between the two theory is that Representation is the idea of that the reader has the information about the subject and it's his/hers point of view what they think about it. However Hypodermic Needle is impacting the readers point of view directly such as showing them false information to control / force into believing the information.