You Conduct a Study in Which Introverts and Extroverts Are

Multiple Choice

You conduct a study in which introverts and extroverts are randomly assigned to work on a task while either facing a mirror or facing a blank wall. You find that that extroverts performed better than introverts and that both introverts and extroverts performed better while facing a mirror than when facing a blank wall. Which conclusion(s) is/are accurate?

A) Although personality type is related to performance, you cannot conclude that it caused an improvement in performance.
B) Although the mirror/wall manipulation is related to performance, you cannot conclude that it caused an improvement in performance.
C) Both personality type and the mirror/wall manipulation caused an improvement in performance.
D) Both a and b are correct