Fig. 3

Scatter plots for 5-fold cross-validation. The results were considered by concatenating all results of 5-fold. For each scatter plot, the x-axis is the scores rated by psychologists, and the y-axis is the predicted scores from our model. The blue dot line is the line \(y=x\), and the red dot lines are the lines \(y=x \pm 5\). a A scatter plot for the 1st model. \({R}^{2}\): 0.977; mean absolute error (MAE): 1.24 (points). b A scatter plot for the final model. \({R}^{2}\): 0.986; MAE: 0.95