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. 2022 Jul 18;13:939411. doi: 10.3389/fpsyt.2022.939411

Figure 4.

Figure 4

Pipeline for signal processing. GA, PSO and their parallel and serial hybrid optimizers were used for channel optimization on three fNIRS features, respectively. SVM was chosen as the classifier. The classification performance of the selected features and classifiers was evaluated by ten-fold cross-validation. Statistical analysis was performed on the accuracy and the number of channels.