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

Figure 1

The contribution of different frequencies (upper row) and the number of features (lower row) in the preselected (black) and best performing (red) feature sets for valence and arousal. The contribution of different frequencies is illustrated in arbitrary scale so that each feature equally contributes to the area in the histogram. The features representing single frequencies increase the corresponding bins. The features representing more than one frequency, for example, 2 Hz wide bands, increase all the corresponding bins within the bands. The bins are, however, increased only by half compared to the previous case of single frequencies. The number of features is given separately for spectral power (SP) and spectral power difference (SPD) features.