dsylexialecture.6 - Dyslexia Lecture 6 Ling 1 2008 Reading...

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Unformatted text preview: Dyslexia Lecture 6 Ling 1 2008 Reading • Recent development in human skills 15000 Cave Drawing As pictograms 4000 Sumerian cuneiform 3000 Hieroglyphics 1500 1000 750 Etruscans borrow Greek alphabet 500 Romans adapt Greco alphabet to Latin Phoenician Greeks Syllabary borrow Phoenician consonant alphabet Development of writing systems Forms of modern writing • Logographic – Represent both the word meaning and pronunciation • Chinese, Japanese (Kanji) 私 せんせい hiragana Consonants • Syllabic • Japanese (hiragana, katakana) • Alphabetic – “Sound writing” • Represents consonants and vowels • Roughly related to the sounds in the language • English, Korean Vowels Dyslexia • Developmental Dyslexia – Inability or extreme difficulty learning to read • Temporal problems in speech perception • Visual problems • Neurological dysfunction – Angular gyrus, inferior temporal cortex • Acquired Dyslexia – Inability or extreme difficulty in reading caused from an acute injury to the brains. Two subtypes • Surface Dyslexia/Phonological Reading – Use of pronunciation rules “common correspondences between spelling and sound. – Works well for a variety of words • spot, envelope, Palin, Obama, tree – But not for “irregular spellings: • Yacht, busy, ache, island, chord Surface Dyslexic • Difficulty reading irregular words • Will “regularize” forms – Sew sue, busy buzzy, ache atchey • Good at reading non-words – nin, dold, blean etc. Over-reliant on spelling-to-sound correspondences Often with very poor comprehension of what they read, also language and writing is impaired. Deep Dyslexia • Deep Dyslexia, Reading by sight vocabulary – Two impairments • A) Unable to sounds out words (use phonological rules) – Unable to read non-words: blean, nin, hust • B) Compromised sight vocabulary – Visual errors: stock-shock, saucer-sausage, crowd-crown – Semantic errors: act-play, close-shut, occasion-event – Complex errors; sympathy-orchestra ! Anatomy of Acquired Dyslexia B A A location associated with surface dyslexia B location associated with deep dyslexia Dual Route Model of Reading Analysis For Sound Visual Analysis Visual Word Form Word Production Analysis For Meaning Functional-Anatomical Inferences Analysis For Sound Visual Analysis Visual Word Form Word Production Analysis For Meaning ...
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This note was uploaded on 01/21/2009 for the course LIN 173 taught by Professor Yushikoshi during the Fall '08 term at UC Davis.

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