1 / 61

Visual Word Recognition

Visual Word Recognition . Connectionist Models of Word Recognition. -. /p I nt/. pint. The Dual Route Model. Letter Detectors. Lexicon (Mental Dictionary). Sublexical System (Rules). Pronunciation Code. Acquired Dyslexia

elewa
Download Presentation

Visual Word Recognition

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Visual Word Recognition

  2. Connectionist Models of Word Recognition

  3. - /pInt/ pint The Dual Route Model Letter Detectors Lexicon (Mental Dictionary) Sublexical System (Rules) Pronunciation Code

  4. Acquired Dyslexia Surface Dyslexia– impaired irregular-word reading pint, chaos

  5. Acquired Dyslexia Surface Dyslexia– impaired irregular-word reading pint, chaos Phonological Dyslexia– impaired nonword reading blark, flirp

  6. /pInt/ The Dual Route Model Surface Dyslexia pint Letter Detectors DAMAGE Sublexical System (Rules) Pronunciation Code

  7. ????? The Dual Route Model Phonological Dyslexia blask Letter Detectors DAMAGE Lexicon (Mental Dictionary) Pronunciation Code

  8. - /pInt/ The PDP Model Context Meaning Spelling Phonology (sound) pint

  9. Properties of PDP models Representations are distributed pint /pInt/

  10. Properties of PDP models Representations are distributed punt /punt/ pint /pInt/

  11. Properties of PDP models Representations are distributed bank /bAnk/ side of a river bank /bAnk/ money institution

  12. Properties of PDP models Representations are distributed berry /beri/ bury /beri/

  13. Properties of PDP models Representations are distributed bass /bAs/ bass /bas/

  14. Properties of PDP models Processing is conducted in parallel

  15. Properties of PDP models The model learns

  16. Properties of PDP models The model learns tip /tip/

  17. Properties of PDP models The model learns

  18. Properties of PDP models The model learns

  19. Properties of PDP models The model learns

  20. Properties of PDP models The model learns

  21. Properties of PDP models The model learns

  22. Properties of PDP models Processing is interactive

  23. The Regularity Effect – longer naming latencies for irregular words than regular words Cortese (1998) –RTs in ms (error rates in parentheses) pant 561 (.01) pint 632 (.28)

  24. - /pInt/ pint The Dual Route Model Letter Detectors Lexicon (Mental Dictionary) Sublexical System (Rules) Pronunciation Code

  25. /pant/ pant The Dual Route Model Letter Detectors Lexicon (Mental Dictionary) Sublexical System (Rules) Pronunciation Code

  26. pint pant lexical route sublexical route lexical route sublexical route I i a output system

  27. Stage 1 pint pant lexical route sublexical route lexical route sublexical route I i a output system

  28. Stage 2 pint pant lexical route sublexical route lexical route sublexical route I i a output system

  29. Stage 3 pint pant lexical route sublexical route lexical route sublexical route I i u output system

  30. Stage 4 pint pant lexical route sublexical route lexical route sublexical route I i a output system

  31. The Regularity Effect – longer naming latencies for irregular words than regular words Cortese (1998) –RTs in ms (error rates in parentheses) and 3 of cycles for DRC model people DRC model pant 561 (.01) 78.9 pint 632 (.28) 86.7

  32. Regularity Effect in PDP Model hint mint weights adjusted tint so that int = /Int/ lint pint weights adjusted so that int = /Int/ Cortese (1998) - PDP error scores Regular (pant) = .070 Irregular (pint) = .176

  33. /pInt/ The PDP Model Surface Dyslexia Context DAMAGE Spelling Phonology (sound) pint

  34. /pant/ pant The Dual Route Model Letter Detectors Lexicon (Mental Dictionary) Sublexical System (Rules) Pronunciation Code

  35. The Lexicon Orthographic Lexicon Semantic System Phonological Lexicon

  36. ?????? The PDP Model Phonological Dyslexia Context Meaning DAMAGE Spelling Phonology (sound) blask

  37. Regularity vs. Consistency (Cortese & Simpson, 2000) Irregular words are usually irregular at two levels 1. grapheme-to-phoneme (e.g., pint) - stick, lid, dish

  38. Regularity vs. Consistency (Cortese & Simpson, 2000) Irregular words are usually irregular at two levels 1. grapheme-to-phoneme (e.g., pint) - stick, lid, dish 2. word body (e.g., pint) - mint, lint, tint

  39. Regularity vs. Consistency (Cortese & Simpson, 2000) Irregular words are usually irregular at two levels 1. grapheme-to-phoneme (e.g., pint) - stick, lid, dish 2. word body (e.g., pint) - mint, lint, tint Consistency Effects are Independent of GPC Regularity Regular Words - moon vs. mood Glushko (1979)

  40. Regularity vs. Consistency (Cortese & Simpson, 2000) Irregular words are usually irregular at two levels 1. grapheme-to-phoneme (e.g., pint) - stick, lid, dish 2. word body (e.g., pint) - mint, lint, tint Consistency Effects are Independent of GPC Regularity Regular Words - moon vs. mood Glushko (1979)

  41. /mUn/ moon The Dual Route Model Letter Detectors Lexicon (Mental Dictionary) Sublexical System (Rules) Pronunciation Code

  42. /mUd/ mood The Dual Route Model Letter Detectors Lexicon (Mental Dictionary) Sublexical System (Rules) Pronunciation Code

  43. /mood/ mood The Dual Route Model Letter Detectors Sublexical System (Rules) good stood wood hood mood food Pronunciation Code

  44. /mood/ moon The Dual Route Model Letter Detectors Sublexical System (Rules) goon boon noon soon moon spoon Pronunciation Code

  45. - /pInt/ pint The Dual Route Model Letter Detectors Lexicon (Mental Dictionary) Sublexical System (Rules) Pronunciation Code

  46. Regularity Consistency Effect in PDP Model good wood weights adjusted hood so that ood = /ud/ stood mood weights adjusted so that ood = /ood/

  47. Regular Words batchspook FRIENDSENEMIESFRIENDSENEMIES patchwatchkook book catchcook latchlook match took hatchshook rook hook

  48. Regular Words batchspook FRIENDSENEMIESFRIENDSENEMIES patchwatchkook book catchcook latchlook match took hatchshook rook hook Irregular Words bind pint FRIENDSENEMIESFRIENDSENEMIES kindwindmint mindtint find lint blindflint hindprint windstint splint

  49. /batch/ batch The Dual Route Model Regular Consistent F>E Letter Detectors Sublexical System (Rules) match hatch batch latch catchwatch Pronunciation Code

More Related