Correlation matrix of the IPC components with the engagement index using ground truth self and acquaintance labels in the HRI setting.

Correlation matrix of the IPC components with the engagement index using ground truth self and acquaintance labels in the HRI setting.人机交互（HRI, Human-Robot Interaction）场景下，以基准真值自我标签与熟人标签为标注依据时，IPC组件与参与度指数之间的相关矩阵。