Interplay between morphology and frequency in lexical access: the case of the base frequency effect.
Interplay between morphology and frequency in lexical access: the case of the base frequency effect.
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DOI：
10.1016/j.brainres.2010.12.022
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发表时间：
2011-02-10
期刊：
影响因子：
2.9
通讯作者：
Bavelier D
中科院分区：
文献类型：
--
作者：
Vannest J;Newport EL;Newman AJ;Bavelier D
词汇加工的一个主要问题是词汇的存储和提取。在这里，我们利用基频效应来检验这一点。具体来说，对形态复杂的单词（由碱基和后缀组成的单词，例如，agree+able）典型地反映基本元素的频率（即，出现agree的所有单词的总频率）而不是表面单词频率（即，频率的一致性本身）。我们称这些复杂的词为可分解的。然而，被称为全词的一类词不显示对基频的这种敏感性（例如，宁静）。使用事件相关的MRI设计，我们利用了这样一个事实，即处理低频率的单词增加BOLD活动相对于高频率的，并研究了基本频率对大脑活动的影响可分解和全词项目。形态复杂的话，一半高，一半低的基本频率，进行了比较，匹配的高，低频率的简单单语素词使用词汇决策任务。形态复杂的话增加激活左下额叶和左上级颞叶皮质与简单的话。唯一反映可分解型和全词型之间行为差异的区域是丘脑。令人惊讶的是，大多数频率敏感区域未能显示基频效应。这种对频率和词类型的不同反应支持了词汇访问过程中多个变量的综合观点，而不是基于记忆的访问和在线计算之间的二分法。词汇通达最好表现为几个神经过程的相互作用，这些神经过程对各种语言因素（包括频率和形态复杂性）具有不同的敏感性。
A major issue in lexical processing concerns storage and access of lexical items. Here we make use of the base frequency effect to examine this. Specifically, reaction time to morphologically complex words (words made up of base and suffix, e.g., agree+able) typically reflects frequency of the base element (i.e., total frequency of all words in which agree appears) rather than surface word frequency (i.e., frequency of agreeable itself). We term these complex words decomposable. However, a class of words termed whole-word do not show such sensitivity to base frequency (e.g., serenity). Using an event-related MRI design, we exploited the fact that processing low-frequency words increases BOLD activity relative to high frequency ones, and examined effects of base frequency on brain activity for decomposable and whole-word items. Morphologically complex words, half high and half low base frequency, were compared to matched high and low frequency simple monomorphemic words using a lexical decision task. Morphologically complex words increased activation in left inferior frontal and left superior temporal cortices versus simple words. The only area to mirror the behavioral distinction between decomposable and whole-word types was the thalamus. Surprisingly, most frequency-sensitive areas failed to show base frequency effects. This variety of responses to frequency and word type across brain areas supports an integrative view of multiple variables during lexical access, rather than a dichotomy between memory-based access and on-line computation. Lexical access appears best captured as interplay of several neural processes with different sensitivities to various linguistic factors including frequency and morphological complexity.
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DOI：
10.1037/0096-1523.2.3.361
发表时间：
1976-01-01
影响因子：
2.1
作者：
FREDERIKSEN, JR;KROLL, JF
通讯作者：
KROLL, JF
影响因子：
4.3
作者：
BALOTA, DA;CHUMBLEY, JI
通讯作者：
CHUMBLEY, JI
影响因子：
2.5
作者：
Bhatnagar, SC;Mandybur, GT
通讯作者：
Mandybur, GT
影响因子：
16.2
作者：
Fiez, JA;Balota, DA;Petersen, SE
通讯作者：
Petersen, SE
影响因子：
3.2
作者：
Bick AS;Frost R;Goelman G
通讯作者：
Goelman G