A Researcher Used an Expectancy Control Design in Her Study

Multiple Choice

A researcher used an expectancy control design in her study of the effectiveness of a new teaching method. Students were randomly assigned to conditions, and the following group means were found (where higher means reflect better performance) : Assuming that all of the differences are statistically significant, what can the researcher conclude?

A) The old teaching method is more effective.
B) The condition with the expectation that the method does not work performed better.
C) The new teaching method, combined with the expectation that the method works, performed the best.
D) Expectations did not have an impact on student performance.