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  "Description": "Predicts Rasch item difficulty from item features (text\nembeddings from any model, template family, content metadata)\nby ridge regression (Hoerl and Kennard, 1970,\n<doi:10.1080/00401706.1970.10488634>) with honest out-of-sample\nuncertainty, uses the predictions as robust informative priors\nto calibrate new items from small pretest samples, in the\nspirit of using collateral information in calibration (Mislevy,\nSheehan and Wingersky, 1993,\n<doi:10.1111/j.1745-3984.1993.tb00422.x>), plans the pretest\nsample size needed for a target precision, and diagnoses item\nfamilies whose predictions cannot be trusted.",
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