Prediction of Alpha Power Using Multiple Subjective Measures and Autonomic Responses

Figures

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  FIGURE 1. Overview of the experimental procedure and analytical workflow. Abbreviations: ECG, electrocardiogram; EDA, electrodermal activity; EEG, electroencephalogram; RSP, respiration.

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  FIGURE 2. Illustration of a single trial in the attentional task (Multiple Object Tracking Task). Initial fixation lasts for 1.5 s, followed by the display of 20 circles for 1.5 s, with either 1 or 5 target circles highlighted in red. Subsequently, all circles turn white for 2 s. After these circles move arbitrarily for 10 s, motion stops and one random circle is colored red. Participants are then prompted to respond using a keyboard.

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  FIGURE 3. The workflow for cross‐experiment validation analysis, illustrating one of the two directions (Exp1 → Exp2).

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  FIGURE 4. Prediction results of leave‐one‐participant‐out cross‐validation using both autonomic and subjective metrics as independent variables (X), in Experiments 1 and 2. The four EEG metrics in the parietal‐occipital region were the dependent variables (Y). Significance of the correlations is denoted by asterisks above the bars (*p < 0.05, **p < 0.01).

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  FIGURE 5. Prediction results of leave‐one‐participant‐out cross‐validation using both autonomic and subjective metrics as independent variables (X), in Experiments 1 and 2. The 8–13 Hz alpha power in parietal‐occipital, central, and frontal regions was the dependent variable (Y). Significance of correlations is denoted by asterisks placed above the bars (*p < 0.05, **p < 0.01).

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  FIGURE 6. Prediction results of cross‐experiment validation using both autonomic and subjective metrics as independent variables (X). The four EEG metrics in the parietal‐occipital region were dependent variables (Y). Significance of correlations is denoted by asterisks placed above the bars (*p < 0.05, **p < 0.01).