Different letter-processing strategies in diagnostic subgroups of developmental dyslexia
Different letter-processing strategies in diagnostic subgroups of developmental dyslexia
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DOI：
10.1080/02643290802309514
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发表时间：
2008-01-01
影响因子：
3.4
通讯作者：
van Leeuwen, Cees
中科院分区：
文献类型：
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作者：
Lachmann, Thomas;van Leeuwen, Cees
正常阅读的成年人（N = 15）和小学儿童（N = 24）和两个诊断亚组的儿童与发展性阅读障碍（N = 21）所有母语为德语的人进行了一个连续的相同不同的任务与成对的字母和非字母（伪字母或几何形状）。一对中的第一个项目总是单独呈现，第二个项目要么单独呈现，要么被一个一致或不一致的非目标形状包围。成年人表现出一致性效应与nonletters，但不与字母，和儿童与两种类型的刺激。此外，频繁单词阅读受损的阅读障碍患者（N = 11）表现出显着较慢的整体反应时间。非文字阅读受损的阅读障碍者（N = 10）表现出一致性效应与非字母，但负一致性效应与字母。研究结果支持这一观点，即正常阅读者已经建立了一个特殊的视觉加工策略的信件。处理速度而不是阅读技能似乎对这种策略的出现至关重要。诵读困难者亚组之间的对比效应揭示了特定的潜在缺陷。
Normally reading adults (N = 15) and primary school children (N = 24) and two diagnostic subgroups of children with developmental dyslexia (N = 21)all native German speakersperformed a successive same-different task with pairs of letters and nonletters (pseudoletters or geometrical shapes). The first item of a pair was always presented on its own, and the second either on its own or surrounded by a congruent or incongruent nontarget shape. Adults showed congruence effects with nonletters but not with letters, and children with both types of stimuli. Frequent-word reading-impaired dyslexics (N = 11) in addition showed dramatically slower overall reaction times. Nonword reading-impaired dyslexics (N = 10) showed congruence effects with nonletters but negative congruence effects with letters. The results support the notion that normal readers have established a special visual processing strategy for letters. Processing speed rather than reading expertise seems crucial for this strategy to emerge. The contrasting effects between subgroups of dyslexics reveal specific underlying deficits.