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{
"model_type": "EnhancedRandomForestRegressor",
"n_estimators": 200,
"max_depth": 15,
"min_samples_split": 10,
"min_samples_leaf": 5,
"max_features": "sqrt",
"random_state": 42,
"n_features_total": 36,
"n_features_selected": 25,
"feature_columns": [
"text_length",
"word_count",
"sentence_count",
"paragraph_count",
"avg_sentence_length",
"avg_word_length",
"flesch_kincaid",
"coleman_liau",
"flesch_reading_ease",
"ari",
"smog",
"linsear_write",
"gunning_fog",
"dale_chall",
"difficult_words",
"difficult_words_ratio",
"syllable_count",
"avg_syllables_per_word",
"polysyllable_count",
"polysyllable_ratio",
"char_count",
"avg_chars_per_word",
"readability_consensus",
"readability_std",
"readability_range",
"mean_aoa",
"median_aoa",
"max_aoa",
"aoa_75th_percentile",
"aoa_90th_percentile",
"difficult_word_ratio",
"coverage_ratio",
"aoa_std",
"aoa_range",
"aoa_grade_estimate",
"source_clear"
],
"selected_feature_columns": [
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"word_count",
"avg_sentence_length",
"flesch_kincaid",
"flesch_reading_ease",
"ari",
"smog",
"linsear_write",
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"polysyllable_count",
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"char_count",
"readability_consensus",
"mean_aoa",
"median_aoa",
"max_aoa",
"aoa_75th_percentile",
"aoa_90th_percentile",
"difficult_word_ratio",
"coverage_ratio",
"aoa_std",
"aoa_range"
],
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"test_samples": 625,
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1997,
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2725,
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615,
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1943,
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3030,
2150,
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2530,
2857,
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1984,
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2165,
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2201,
1574,
2142,
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2855,
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1944,
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1617,
389,
1581,
924,
2036,
2957,
1224,
1946,
739,
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868,
539,
2721,
1371,
1145,
1031,
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357,
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1353,
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2220,
2741,
2105,
133,
1140,
933,
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1531,
1214,
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3088,
2395,
1996,
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1958,
1384,
894,
828,
3040,
1683,
2683,
2667,
2619,
652,
172,
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2979,
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750,
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1492,
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143,
3063,
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717,
2960,
2502,
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2492,
395,
2654,
2224,
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1365,
2607,
1903,
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2109,
1296,
1821,
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3031,
2326,
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2634,
2143,
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1122,
2239,
2504,
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728,
412,
1516,
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616,
114,
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2082,
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2546,
1630,
11,
2444,
284,
1066,
1191,
1440,
3112,
2918,
2826,
1568,
2427,
2686,
1687,
851,
2207,
895,
496,
2305,
1782,
335,
515,
1348,
1015,
2926,
2921,
1781,
2569,
1785,
2070,
356,
2970,
1312,
1635,
550,
2388,
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2521,
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2794,
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1773,
2141,
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1679,
153,
2900,
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1470,
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1212,
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1141,
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512,
633,
2955,
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1012,
1931,
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2923,
116,
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1974,
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119,
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2848,
2806,
3052,
635,
369,
268,
2703,
46,
991,
876,
773,
1219,
1126,
4,
1595,
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2991,
2491,
1077,
837,
681,
1715,
2352,
2617,
2361,
2197,
1148,
574,
50,
853,
1982,
1823,
833,
1115,
1166,
2518,
1906,
971,
2701,
399,
2559,
2368,
19,
684,
35,
2947,
524,
2455,
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1841,
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1705,
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245,
784,
1409,
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154,
1686,
625,
2733,
2995,
1346,
569,
3053,
1758,
1816,
2065,
127,
3101,
2006,
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3098,
190,
1139,
992,
699,
606,
180,
301,
2544,
2893,
1060,
2937,
2997,
2565,
1069,
2524,
2205,
1243,
16,
3104,
546,
658,
2820,
2851,
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2331,
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225,
2074,
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3084,
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1693,
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1045,
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3100,
2735,
639,
2896,
1218,
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1603,
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1704,
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3035,
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2056,
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2301,
1327,
2049,
880,
3038,
623,
2393,
2889,
1787,
262,
1634,
1438,
2198,
1969,
2520,
1802,
640,
2385,
2598,
2948,
1959,
488,
1843,
1734,
146,
1534,
1986,
1369,
2450,
3056,
2811,
659,
1794,
2511,
186,
1147,
608,
2191,
2799,
1930,
197,
2327,
293,
766,
400,
122,
202,
835,
2294,
1439,
1733,
1695,
3048,
1707,
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2432,
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1589,
2267,
641,
1,
2160,
698,
1636,
1291,
2974,
2489,
1520,
1853,
1136,
3018,
1631,
1998,
663,
683,
1257,
317,
648,
1434,
1479,
709,
1282,
1768,
972,
2675,
2680,
1306,
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2264,
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1076,
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337,
2767,
2343,
1016,
1275,
455,
815,
2317,
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1981,
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161,
1579,
2777,
2449,
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1500,
1129,
2613,
1021,
1585,
1955,
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34,
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1962,
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1995,
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838,
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2750,
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2711,
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810,
1871,
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176,
1741,
2077,
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3016,
930,
2646,
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1964,
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2229,
2547,
1345,
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1742,
605,
1956,
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1317,
1754,
831,
1547,
1320,
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1948,
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1340,
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"cv_mae": 0.41789318171271833,
"cv_std": 0.011257100569327851,
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"word_count": 0.012377663994546382,
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"flesch_kincaid": 0.014394845200040371,
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"ari": 0.011636248993775328,
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"linsear_write": 0.05353049467153113,
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"dale_chall": 0.008328335120317188,
"difficult_words": 0.017068432814141107,
"syllable_count": 0.012830363677323276,
"polysyllable_count": 0.0069004379668197975,
"polysyllable_ratio": 0.004504473090921254,
"char_count": 0.013916827010508816,
"readability_consensus": 0.03812128961542228,
"mean_aoa": 0.02255968227408099,
"median_aoa": 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"
}