Fig. 2: Results of the principal component analysis and cluster analysis.

A Associations between the four principal components (PCs) identified by the Principal Component Analysis and the linguistic features; green-colored boxes indicate a positive association, while red-colored boxes a negative association. B Silhouette width for participants included in both clusters (horizontal axis) and average silhouette width for the two-cluster solution (red dashed line). C Clusters distribution around centroids.