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0.0034676473133392286, "max_aoa": 0.21385820806081232, "aoa_75th_percentile": 0.006338836982081097, "aoa_90th_percentile": 0.03645721694460121, "difficult_word_ratio": 0.018733691863403807, "coverage_ratio": 0.008292428695067333, "aoa_std": 0.1229381246429495, "aoa_range": 0.1380234550317823 }, "trained_date": "2025-07-02T23:04:35.722721", "enhancements": [ "Enhanced linguistic features", "Comprehensive AoA metrics", "Feature selection", "Robust scaling", "Stratified validation", "Out-of-bag scoring" ], "description": "Enhanced Random Forest readability assessment model trained on WeeBit and CLEAR corpora with 35+ linguistic features, AoA metrics, and improved cross-domain generalization" }