Relationships between each engagement question and PC1.

“R” denotes the Pearson correlation between each question and PC1, while “contribution” denotes the % of relative contribution of each individual question to the principal component.其中“R”代表每道题目与主成分1（PC1）之间的皮尔逊相关系数（Pearson correlation），而“贡献度”则指代单道题目对该主成分的相对贡献百分比。