Answer:
The Pygmalion Effect
Explanation:
Pygmalion effect: In psychology, the term "Pygmalion effect" is also referred to as the "Rosenthal effect" and was proposed by Robert Rosenthal. It is defined as one of the psychological phenomena in which an individual's high expectation related to something gives rise to an improved performance in the area he or she is involved in.
In other words, it is described as a phenomenon in which an individual's expectations from another individual's behavior leads to create a "self-fulfilling prophecy.
In the question above, the given statement would be an example of the Pygmalion effect.