Final answer:
Robert Rosenthal suggested that teachers' positive influence on students' expectations is best achieved by communicating high expectations for student success, which aligns with the concept of the self-fulfilling prophecy in educational psychology.
Step-by-step explanation:
Robert Rosenthal proposed that teachers can assert a positive influence over students in terms of expectations by communicating high expectations for student success. This concept is part of a larger discussion on the impact of teacher expectations on student performance, often referred to as the Pygmalion effect. Expectations from educators can lead to a self-fulfilling prophecy where students perform in accordance with these beliefs. In contrast to options like providing rewards for good behavior, setting low academic standards, or using punishment as a disciplinary method, conveying high expectations is about instilling confidence and a belief in students' capabilities that encourage them to achieve more. This is substantiated by psychological studies and educational reforms that emphasize positive reinforcement, better teaching methods, and creating an environment where students feel valued and believed in.