Final answer:
Sally's disagreement with Jean's opinion due to her dislike for Jean is an example of holding negative attitudes toward someone with differing viewpoints.
Step-by-step explanation:
The situation described in the question is an example of holding negative attitudes toward someone with differing viewpoints. Sally dislikes Jean and perceives her as bossy, so she disagrees with Jean's opinions. This behavior is related to a phenomenon known as the quashing of dissenting group members' opinions.