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首页> 外文期刊>Laterality >Hemisphere specialisation and inter-hemispheric cooperation during a phonological task: Effect of lexicality as assessed by the divided visual field approach
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Hemisphere specialisation and inter-hemispheric cooperation during a phonological task: Effect of lexicality as assessed by the divided visual field approach

机译：在语音任务中的半球专业化和半球之间的合作：词汇划分的效果，通过分割视野方法评估

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摘要

In the presented experiment we explored the effect of lexicality on hemisphere specialisation and cooperation during a phonological task. The divided visual field (DVF) method with bilateral presentation (BVF) of redundant (identical) stimuli is considered an appropriate approach to assess inter-hemispheric cooperation (IHC). IHC is supposed to increase the efficiency of cognitive processes. Specifically, it has been shown that, compared to unilateral hemifield presentation, word processing is significantly more efficient if stimuli were presented under bilateral redundancy conditions. The performance enhancement during bilateral vs. unilateral presentation is called bilateral redundant gain (BRG). In the present experiment a DVF was used and participants were required to perform a rhyme detection task in two blocks, one in words and another one in pseudowords. Each item was presented in two different modes, one unilateral (right or left hemi-visual field) and another one bilateral (simultaneous redundant presentation). Unilateral trials allow one to study hemispheric specialisation, while bilateral redundant trials allow one to study inter-hemispheric cooperation. We obtained left hemisphere specialisation for both types of items (word, pseudoword). Moreover, words were more efficiently processed than pseudowords. Additionally, words were processed more efficiently in BVF than in unilateral presentation, inducing BRG. No similar effect was obtained for pseudowords. These results are discussed in respect to findings reported by other studies suggesting that hemispheric specialisation depends on lexicality. Moreover, compared to lexical decision tasks used in previous studies, the phonological task used in the present study seems to modulate the inter-hemispheric cooperation less.
机译：在提出的实验中，我们探讨了词汇性对语音任务中半球专业化与合作的影响。具有冗余（相同）刺激的双边呈现（BVF）的分开视野（DVF）方法被认为是评估半球间合作（IHC）的合适方法。 IHC应该可以提高认知过程的效率。特别地，已经显示出，与单边半场呈现相比，如果在双边冗余条件下呈现刺激，则文字处理明显更有效。双边演示与单边演示之间的性能增强称为双边冗余增益（BRG）。在本实验中，使用了DVF，要求参与者分两个部分执行一个韵律检测任务，一个为单词，另一个为伪单词。每个项目以两种不同的方式呈现，一种是单边的（左右半视野），另一种是双边的（同时重复呈现）。单边试验允许研究半球专业化，而双边冗余试验则允许研究半球间合作。我们获得了两种项目（单词，伪单词）的左半球专长。而且，单词比伪单词更有效地处理。此外，与单边提示相比，BVF中的单词处理效率更高，从而诱发了BRG。对于伪字没有获得类似的效果。针对其他研究报告的发现对这些结果进行了讨论，这些发现表明半球专业化取决于词汇能力。此外，与以前的研究中使用的词汇决策任务相比，本研究中使用的语音任务似乎对半球间合作的调节较少。

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