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[[@mcmahanAmbiguityEngagement2018]]\"\nurl: https://roamresearch.com/#/app/megacoglab/page/0dCO_io-p\nauthor: Joel Chan\ndate: Mon Jul 12 2021 12:35:18 GMT-0400 (Eastern Daylight Time)\n---\n\n- Summary::\n - Increased word [ambiguity]([[ambiguity]]\n - ![](https://firebasestorage.googleapis.com/v0/b/firescript-577a2.appspot.com/o/imgs%2Fapp%2Fmegacoglab%2FYK5hjRvILZ.png?alt=media&token=91149ef7-7b6d-4595-ba46-553a1e300607) (p. 891)\n - ![](https://firebasestorage.googleapis.com/v0/b/firescript-577a2.appspot.com/o/imgs%2Fapp%2Fmegacoglab%2Ff1KNxVhp1L.png?alt=media&token=360f4488-5542-48a5-b832-624d4cecda87) (p. 892, Table 2)\n - Note: this effect was ~order of magnitude smaller than effects of number of disciplines and subject-wide modularity\n- **Grounding Context**\n - sample: ~1.1M abstracts from Web of Science (after trimming for min. threshold citations, and at least 5 usable terms for ambiguity measure in abstract)\n - ![](https://firebasestorage.googleapis.com/v0/b/firescript-577a2.appspot.com/o/imgs%2Fapp%2Fmegacoglab%2F6swfV2e5lD.png?alt=media&token=663be791-00fa-43a8-939e-16b1e2b3839b) (p. 880 - 881)\n - [[ambiguity]]\n - define as posterior distribution over pr(M | t, c) (probability of each possible meaning for a given token in a given context) - see Appendix A (how to build \"meaning graph\" for each token), and Appendix B (how to estimate ambiguity)\n - very similar to [[LDA]]\n - ![](https://firebasestorage.googleapis.com/v0/b/firescript-577a2.appspot.com/o/imgs%2Fapp%2Fmegacoglab%2FkBZZ_HTTGv.png?alt=media&token=1b9f4a7c-5f25-4555-82c0-4f2785d46fb6) (p. 898)\n - ![](https://firebasestorage.googleapis.com/v0/b/firescript-577a2.appspot.com/o/imgs%2Fapp%2Fmegacoglab%2FyJ2BvBP1aJ.png?alt=media&token=06e19e17-993e-43dc-9095-47215d99ff63)\n - meaning simplified to proxy into synonyms from Moby and WordNet thesauri\n - would prefer to define as cliques in synonym graph, but... for reasons, decided 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