High-Frequency Electroencephalographic Activity in Left Temporal Area Is Associated with Pleasant Emotion Induced by Video Clips

Figure 9

(a) The topographical distribution of features and (b) the importance of different channels in the classification of testing data for valence and arousal. The results are given for the feature sets that resulted in the best classification rate for the testing data containing 79 and 162 features for valence and arousal, respectively. The plots are in absolute scale representing the number of features (a) and the percentage how much the classification performance is decreased if all the features in that specific channel are excluded from the feature set (b). Spectral power (on the left column) and spectral power difference (on the right column) features are illustrated separately for both valence and arousal.

(a)

(b)