Halderman Laura K, Chiarello Christine
Department of Psychology, University of California, Riverside, CA 92507, USA.
Brain Lang. 2005 Nov;95(2):342-52. doi: 10.1016/j.bandl.2005.02.005.
A lateralized backward masking paradigm was used to examine hemisphere differences in orthographic and phonological processes at an early time course of word recognition. Targets (e.g., bowl) were presented and backward masked by either pseudohomophones of the target word (orthographically and phonologically similar, e.g., BOAL), orthographically similar (little phonological similarity, e.g., BOOL), or unrelated (e.g., MANT) non-words. Stimuli were presented to the left visual field (LVF) or right visual field (RVF) using target/mask durations of 30 or 50 ms. Responses to RVF presentations were facilitated in the pseudohomophone condition relative to the orthographically similar condition. This provides evidence that the LH can access phonology in the earliest moments of word recognition. In contrast, responses to LVF stimuli showed a greater degree of facilitation for the orthographically similar condition relative to the unrelated condition as compared to RVF presentations. These results suggest the Strong Phonological Theory of Frost (1998) is potentially an accurate description of reading processes supported by the LH, but may not be applicable to the RH. The lexical route offered by the Dual Route Cascaded model may better describe reading processes at early moments in the RH (Coltheart, Rastle, Perry, Langdon, & Ziegler, 2001).
采用一种偏侧化的后向掩蔽范式，在单词识别的早期阶段检查正字法和语音加工过程中的半球差异。呈现目标词（如bowl），并用目标词的假同音字（正字法和语音相似，如BOAL）、正字法相似（语音相似性低，如BOOL）或无关（如MANT）的非词进行后向掩蔽。使用30或50毫秒的目标/掩蔽持续时间，将刺激呈现给左视野（LVF）或右视野（RVF）。相对于正字法相似条件，在假同音字条件下对右视野呈现的反应得到促进。这提供了证据，表明左半球在单词识别的最初时刻就能获取语音信息。相比之下，与右视野呈现相比，对左视野刺激的反应在正字法相似条件下相对于无关条件表现出更大程度的促进。这些结果表明，弗罗斯特（1998）的强语音理论可能是对左半球支持的阅读过程的准确描述，但可能不适用于右半球。双通路级联模型提供的词汇通路可能更好地描述右半球早期的阅读过程（科尔瑟特、拉斯特尔、佩里、兰登和齐格勒，2001）。
