Speaker Sincerity Detection based on Covariance Feature Vectors and Ensemble Methods
Table 3: Spearman’s correlation coefficient obtained with the fusion of feature sets at both feature and score level.
['Feature level', 'Correlation LOSO CV', 'Correlation Test Set']
Therefore, in an attempt to further improve the performance we have employed two strategies to combine these feature sets: a fusion at feature level which concatenates feature sets; fusion at score level that combines the output scores of the regression models using an average rule.