How to make the word-length effect disappear in letter-by-letter dyslexia - Implications for an account of the disorder
How to make the word-length effect disappear in letter-by-letter dyslexia - Implications for an account of the disorder
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DOI：
10.1111/j.0956-7976.2005.01571.x
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发表时间：
2005-07-01
影响因子：
8.2
通讯作者：
Riddoch, MJ
中科院分区：
文献类型：
--
作者：
Fiset, D;Arguin, M;Riddoch, MJ
逐字母（LBL）阅读障碍的诊断是基于观察到随着刺激物中字母数量的增加，单词命名延迟的大量和单调增加。这种表现模式通常被解释为LBL阅读障碍的单词识别依赖于单个字母的顺序识别。我们发现，在7例LBL患者，可以消除的词长度效应，如果不同长度的单词相匹配的混淆性（一个字母和字母表的其余部分之间的视觉相似性）的总和，其组成字母。另外的实验表明，这一结果是介导的平行字母处理，而不是任何补偿串行处理策略。这些研究结果表明，平行处理有助于显着的外显词识别LBL阅读障碍和字母处理障碍是根本性的，在造成的障碍。
The diagnosis of letter-by-letter (LBL) dyslexia is based on the observation of a substantial and monotonic increase of word naming latencies as the number of letters in the stimulus increases. This pattern of performance is typically interpreted as indicating that word recognition in LBL dyslexia depends on the sequential identification of individual letters. We show, in 7 LBL patients, that the word-length effect can be eliminated if words of different lengths are matched on the sum of the confusability (visual similarity between a letter and the remainder of the alphabet) of their constituent letters. Additional experiments demonstrate that this result is mediated by parallel letter processing and not by any compensatory serial processing strategy. These findings indicate that parallel processing contributes significantly to explicit word recognition in LBL dyslexia and that a letter-processing impairment is fundamental in causing the disorder.