{
  "schema_version": "mdu_riskbench.v1",
  "name": "MDU-RiskBench",
  "paired_dataset": "MDU-RiskText v1",
  "task": "Text-only Youth Digital Use Risk Screening",
  "participant_count": 850,
  "selected_source_video_count": 9831,
  "participant_disjoint_splits": true,
  "split_counts": {
    "train": 593,
    "validation": 131,
    "test": 126
  },
  "ordinal_labels": [
    "no_observed_risk",
    "mild_risk",
    "moderate_risk",
    "high_risk"
  ],
  "abstention_label": "insufficient_evidence",
  "label_counts": {
    "no_observed_risk": 226,
    "mild_risk": 432,
    "moderate_risk": 172,
    "high_risk": 20
  },
  "headline_settings": {
    "video_only": "PriVTE privacy-filtered video-to-text evidence",
    "non_video_only": "coarse app-category, heart-rate-bin, and questionnaire-risk text",
    "all_filtered_text": "PriVTE evidence plus coarse auxiliary text"
  },
  "primary_metrics": [
    "accuracy",
    "macro_f1",
    "ordinal_mae",
    "ordinal_rmse",
    "coverage"
  ],
  "ordinal_metric_policy": "MAE and RMSE are computed on predictions in the four ordinal labels; insufficient_evidence is reported through coverage.",
  "source_video_selection": {
    "maximum_selected_per_participant": 12,
    "selection": "uniform_over_ordered_source_inventory",
    "minimum_video_stream_duration_seconds": 4.0,
    "all_selected_files_must_pass_technical_validation": true,
    "replacement_after_selected_file_failure": false
  }
}