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".
People cannot see you unless you are looking that way. So honking your horn can attract attention causing eye contact. Use to help prevent crash. Helpful to communicate with other drivers.