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The dataset includes behavioral responses, hierarchical event descriptors for systematic meta-analysis, and psychopathology measures derived from the Child Behavior Checklist, providing a rich resource for understanding neural correlates of development and mental health. This release includes minimal quality control verification; future releases will incorporate personalized electrode locations, lead field matrices, and eye-tracking data.\",\n  \"methods_description\": \"EEG data were collected during six tasks: three passive tasks (resting state with eyes open/closed fixation, surround suppression with flashing peripheral disks, and movie watching) and three active tasks requiring participant responses (contrast change detection with feedback, sequence learning, and symbol search). Behavioral responses including reaction times and accuracy were recorded during task performance and integrated into event files. 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