Jones and Harris (1967) randomly divided participants into 3…

Jones and Harris (1967) randomly divided participants into 3 groups: the first group chose to write a Pro-Castro or Anti-Castro speech and then present it; the second group was randomly assigned to write a pro or anti-Castro speech and present it; and the third group was assigned as listeners. The listener group was told to record what the speaker really believed about Castro, with higher scores indicating a more pro-Castro attitude. Which of the following statements are correct about the results of this study?