The cognitive process whereby what the media presents to their audience influences what people think about afterwards, even if only temporarily, as they process information is called:

priming

Explanation:

Priming: In psychology, the term priming is defined as a phenomenon that involves a specific technique in which an individual's tendency to respond towards a subsequent stimulus is being influenced by the previous stimulus in the absence of any "conscious guidance". The concept of "priming best work by activating or developing a representation, connection, or association in an individual's memory before any other stimulus is being presented or introduced.

In the question above, the given statement signifies the "priming".