Online corpus: Literacy teachers' best friend

  • View

  • Download

Embed Size (px)


Presentation delivered at Dyslexia Guild Summer Conference 2011 in Oxford. (Slideshow updated based on feedback from the session).

Text of Online corpus: Literacy teachers' best friend

  • 1. Online Corpus Literacy TeachersBest FriendDominik Luke http :// Dyslexia GuildSummer Conference 2011

2. Outline What is a corpus Answering questions with a corpus The language of corpus searches The corpus and the classroom Practice 3. Corpus / Corpora ???? 4. of about language knowledge 5. Prescriptivism how language should be used Descriptivism how languageisused v 6. Most of the prescriptive rules ofthe language mavensmake no sense on any level. They are bits of folklore that originated for screwball reasons several hundred years ago For as long as they have existed, speakers have flouted them 7. intellectual abdication should be ashamed current around 1900 a perversion of grammatical education blind to textual evidence even when he himself exhibits it dishonest and stupid vile little compendium of tripe about style GrammarianGeoffrey K Pullum on More passives in Orwell's pompous essay with the warning about how you mustn't use them than in any periodical you can lay your hands on! 8. This usage stuff isnotstraightforwardand easy. If ever someone tells you that the rules of English grammar are simple and logical and you should just learn them and obey them, walk away, because you're gettingadvice from a fool. 9. Corpus Key modern tool for finding outabouthow language works 10. Corpus is a large database ofrepresentativelanguage samples 11. Corpus 100s of millions of words from (mostly) written language in different genres in small samples (~2000 words) 12. Corpus used for linguistic research, making dictionaries, writing grammars, 13. 14. Corpora available for teachers 15. Access to COCA and related BYU corpora is free butfreeregistration required for more than ~10 queries a day 16. 17. Brown the grandfather COCA BNC Webcorp Google 18. 19. 20. Searching a corpus early on in the process of making a generalization can save you a lot of unpleasant surprises later. 21. How do we use the word dyslexia?

  • We speak more often of dyslexic children than adults.
  • We speak more often of dyslexia than any other dys- word. 22. Concordance BNC: dyslexic [n*] COCA:dyslexic [n*] 23. COCA: dys* 24. Suffixing rules *yed *ied 25. Suffixing rules *yed *ied pl a yed st a yed portr a yed enj o yed unempl o yed surv e yed d ied t r ied mar r ied wor r ied identi f ied app l ied 26. The Corpus Magic * [ ] ? Different corpora use slightly different codes. Read the manual. [n* ] 27. The Corpus Magic * [ ] ? Any one character Any number of characters (incl 0) Lemma(all inflectional forms of a word) Different corpora use slightly different codes. Read the manual. [n* ] Part of speech tags (e.g. nouns) 28. * *each each, reach, beach, teach, outreach, , impeach, teach* teachers, teaching, , teachable, teacher-librarians, t*ch touch, teach, tech, torch, trench, twitch, , three-inch, teach * teach the, teach us, teach students, 29. ? ?each reach, beach, teach, peach, leach, keach, each? each- (1), each# (1) [ie nothing] ?each? peachy, bleachy, teacha, reachs (2)[ie spelling error] , t?ch tech, tach, toch, tuch, tsch, tich t??ch touch, teach, torch, tisch, 30. [Lemma] 31. Part of speech tags [run] . [n*] [run] [n*] 32. Common tags [n*] noun [NN2] plural nouns [v*] verb [VVD] verb past tense [aj*](BNC)/ [j*] (COCA) adjective [av*](BNC)/ [r*] (COCA)adverb 33. Help 34. 35. 36. You can also cats and dogs search for idioms ?each*s combine wildcards [=pretty] search for synonyms car|bike|horse search for alternatives used -car exclude searches For more details see: 37. Concordance + KWIC *ies.[N*] 38. KWIC K ey- W ord InC ontext *ies.[N*] 39. Limit searches by genre 40. Other questions corpus can answer

  • Are there more nouns or verbs ending in-ies?* ies.[V*]vs.*ies.[N*]
  • Are there four-letter verbs ending in-edin the present tense???ed.[VVB]
  • What are the most common adjectives describing students vs. pupils.[j*] [student]vs.[j*] [pupil]
  • What do we say teachers do most often?[teacher] [vvb] 41. Corpus, rules, and regularity pre* *ed *ies.[V*] 42. Collocations Limits on variability See also Kennedy, p. 80-23 43. Collocations (cont) Limits on variability See also Kennedy, p. 80-23 44. Collocations (cont) [teacher] must [v*] 45. Idioms and set phrases 275 results 359 results 46. Google as a Corpus " put the search text in quotes " use*for the search item 47. 48. Google as a CorpusPros & Cons PRO:rare, low frequency usage, uptodate usage CON: no sampling, no frequency sort, no genre limit, no part of speech tags 49. Google results counts are only rough estimates Different people searching in different geographic locations can get different numbers Sometimes searching for A gives fewer results than searching for A without B 50. but Google fights can be 51. WebCorp is makes Google search results linguist-friendly 52. Avoid Common Corpus Errors Be aware oflimitations : sampling, coverage, size, presence oftyposand errors,bad part of speech tagging Beware of lowfrequencyresults Beware ofhomographs Check results come from multiplesources CheckKWICto confirm relevance Limit search bygenre 53. Check examples and sources 54. Always check low frequency results must [v*] [n*] sometimes they come from the same source 55. False roots corner, silly, preface, cockroach, protest, stable 56. Make your own corpus with TextSTAT http:// 57. Make your own corpus with AntConc 58. Corpus in the classroom teacher preparation student discovery 59. Teacher preparation

  • find relevant, common examples
  • prepare worksheets
  • check for exceptions
  • find out answers to student questions about rules and usage

60. Student discovery

  • show search results to students to work out rules or word meanings
  • teach students how to search for questions
  • ask students to give each other puzzles for searching

61. For heavy classroom use register for group access to prevent spam lock out 62. Corpus v dictionary 63. Non-classroom corpus use supplement dictionary cross-word puzzles check typical usage when writing 64. Where to go next? 65. Thank you Contact