Department of Psychology, University of California, Riverside, California, United States.
Brain Lang. 2011 Dec;119(3):232-7. doi: 10.1016/j.bandl.2011.05.005. Epub 2011 Jun 16.
The extent to which orthographic and phonological processes are available during the initial moments of word recognition within each hemisphere is under specified, particularly for the right hemisphere. Few studies have investigated whether each hemisphere uses orthography and phonology under constraints that restrict the viewing time of words and reduce overt phonological demands. The current study used backward masking in the divided visual field paradigm to explore hemisphere differences in the availability of orthographic and phonological word recognition processes. A 20ms and 60ms SOA were used to track the time course of how these processes develop during pre-lexical moments of word recognition. Nonword masks varied in similarity to the target words such that there were four types: orthographically and phonologically similar, orthographically but not phonologically similar, phonologically but not orthographically similar and unrelated. The results showed the left hemisphere has access to both orthography and phonology early in the word recognition process. With more time to process the stimulus, the left hemisphere is able to use phonology which benefits word recognition to a larger extent than orthography. The right hemisphere also demonstrates access to both orthography and phonology in the initial moments of word recognition, however, orthographic similarity improves word recognition to a greater extent than phonological similarity.
在每个半球的单词识别初始阶段，拼写法和语音法过程的可用程度是特定的，特别是对于右半球。很少有研究调查每个半球是否在限制单词观看时间和减少明显语音要求的约束下使用拼写法和语音法。本研究使用分视场范式中的反向掩蔽来探索半球在拼写法和语音法单词识别过程中的可用性差异。使用 20ms 和 60ms 的 SOA 来跟踪这些过程在词汇前阶段的发展时间进程。非词掩蔽与目标词的相似性各不相同，共有四种类型：拼写法和语音法相似、拼写法但不是语音法相似、语音法但不是拼写法相似和不相关。结果表明，左半球在单词识别过程的早期阶段同时使用拼写法和语音法。随着处理刺激的时间增加，左半球能够使用语音法，这对单词识别的益处大于拼写法。右半球在单词识别的初始阶段也表现出对拼写法和语音法的使用，但拼写法相似性比语音法相似性更能提高单词识别。
