Semantic Typicality Effects in Acquired Dyslexia: Evidence for Semantic Impairment in Deep Dyslexia.
Semantic Typicality Effects in Acquired Dyslexia: Evidence for Semantic Impairment in Deep Dyslexia.
复制标题
获得性阅读障碍的语义典型性效应：深度阅读障碍语义障碍的证据。
DOI：
10.1080/02687030903422486
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发表时间：
2010
期刊：
影响因子：
2
通讯作者：
Thompson,CynthiaK
中科院分区：
文献类型：
--
作者：
Riley,EllynA;Thompson,CynthiaK
背景：获得性深层阅读障碍以字音转换障碍和口语阅读中产生语义错误为特征。有几种理论试图解释深度阅读障碍中语义错误的产生，一些理论认为这些错误是由字形-音素和词汇-语义加工过程中的障碍引起的，另一些理论则认为这种错误源于语音产生的缺陷。虽然这两种观点都得到了一定程度的认可，但现有的有限证据并不能清楚地排除语义错误产生于词汇-语义输入加工缺陷的可能性。目的：为了研究深度阅读困难个体的语义加工，本研究采用在线类别验证范式考察了深层阅读困难个体、语音阅读障碍个体和对照个体的典型性效应。这项任务要求在没有言语产生的情况下进行明确的语义通达，重点观察书面或口头输入的语义加工。方法与步骤：为了检查语义损害的部位，任务以视觉和听觉方式进行，反应时作为主要的依赖测量。结果与结果：对照组和语音阅读障碍组在两种模式下都表现出典型效应，而深层阅读障碍组在两种模式下都没有表现出典型效应。结论：这些发现提示深层阅读障碍与语义加工缺陷有关。虽然这并不排除词汇-语义加工的其他模块存在伴随缺陷的可能性，但这一发现为以语义加工为重点的深层阅读障碍的治疗提供了方向。
Background: Acquired deep dyslexia is characterised by impairment in grapheme-phoneme conversion and production of semantic errors in oral reading. Several theories have attempted to explain the production of semantic errors in deep dyslexia, some proposing that they arise from impairments in both grapheme-phoneme and lexical-semantic processing, and others proposing that such errors stem from a deficit in phonological production. Whereas both views have gained some acceptance, the limited evidence available does not clearly eliminate the possibility that semantic errors arise from a lexical-semantic input-processing deficit.Aims: To investigate semantic processing in deep dyslexia this study examined the typicality effect in deep dyslexic individuals, phonological dyslexic individuals, and controls using an online category verification paradigm. This task requires explicit semantic access without speech production, focusing observation on semantic processing from written or spoken input.Methods & Procedures: To examine the locus of semantic impairment, the task was administered in visual and auditory modalities with reaction time as the primary dependent measure. Nine controls, six phonological dyslexic participants, and five deep dyslexic participants completed the study.Outcomes & Results: Controls and phonological dyslexic participants demonstrated a typicality effect in both modalities, while deep dyslexic participants did not demonstrate a typicality effect in either modality.Conclusions: These findings suggest that deep dyslexia is associated with a semantic processing deficit. Although this does not rule out the possibility of concomitant deficits in other modules of lexical-semantic processing, this finding suggests a direction for treatment of deep dyslexia focused on semantic processing.