汉语名-动兼类效应的神经机制研究

文章运用ERP技术,考察了汉语名-动兼类词在语法语境下的脑神经机制。实验结果显示,名-动兼类词与非兼类的名词和动词所诱发的P600成分没有显著差异,只有在动词语境下,名-动兼类词才在额区和中央区诱发出一个更小的N400成分;与动词语境中的名-动兼类词相比,名词语境中的名-动兼类词诱发出更大的P600成分,这与非兼类名词、动词相互分离的神经机制相同。根据实验结果认为,与相应的非兼类名词和动词相比,从语法角度划分的汉语名-动兼类词没有特异的脑神经机制。     

汉语名词、动词和动名兼类词语义加工的偏侧化现象——来自ERP的研究

将ERP技术和半视野技术相结合,采用词汇判断任务,对汉语名词、动词和动名兼类词在左脑和右脑中的加工机制进行了考察。实验结果显示,名词和动词的N400仅在左视野/右脑存在差异,名词和动词的N400在左视野/右脑和右视野/左脑中都比偏（动）和偏（名）更负。不同词类的LPC在右视野/左脑中没有显著差异;偏（名）和偏（动）的LPC在左视野/右脑中比名词和动词更正。实验结果表明,在没有语境条件下,汉语名词和动词的差异主要在具体性上,动名兼类词体现出不同于名词、动词的加工机制。     

汉语母语者英语动词三种屈折变化形式加工机制的差异

采用ERP技术考察了汉语母语者,英语动词三种屈折变化形式加工机制的差异。结果发现,英语动词进行式的屈折变化形式- ing的错误使用诱发了P600成分;完成式的屈折变化形式- ed的错误使用诱发了N400成分;完成式中没有明显屈折变化标识的不规则词的错误使用没有诱发典型的ERP成分。研究结果表明：对于缺乏英语使用环境、母语为汉语的晚期英语学习者来说,屈折变化形式- ing,完成式规则动词的变化形式- ed和没有明显形态变化标识的不规则动词的变化形式具有不同的加工机制,前者可能处于由陈述性记忆系统向程序性记忆系统加工的转变过程中,而后两者更多地由陈述性系统进行加工。这种加工机制的差异可能与动词屈折变化规则的复杂程度有关。     

身体活动与心理活动动词加工的ERP比较

在19名右利手被试完成词汇判断任务的同时,通过119个头皮电极记录其事件相关电位（ERP）,以此来探讨表示身体活动的动词与表示心理活动的动词之间的加工差异。研究结果表明,在200~300ms时窗,在左半球枕区附近,身体活动动词所诱发的ERP比心理活动动词所诱发的ERP在正走向上更小。在300~400ms（即类似的N400）时窗,动词类型效应出现在中线和左半球的更大的区域上,特别是中央区附近,身体活动动词所诱发的ERP比心理活动动词所诱发的ERP在负走向上更大。语言表征的神经生物学理论可以解释本研究的部分结果。     

中文句子中双音节兼类词句法分析历程初探

以既可用作名词,又可用作动词的汉语双音节兼类词为材料,采用移动窗口范式,考察了汉语句子中名词倾向性高和低两类兼类词句法分析的详细历程。结果发现,两类兼类词与各自的控制词之间,均未出现阅读时间上的显著差异,因此并不支持延迟模型所提出的兼类词句法角色延迟指派的观点。实验还发现,名词倾向性高的兼类词引起了更大的加工困难。此外,即便是名词倾向性低的兼类词,被试也仍为其指派名词的句法角色。花园路径模型和制约满意理论均不能单独和完整解释上述发现。文章指出,实验结果支持一种既不同于花园路径模型,又不同于制约满意理论的权变的理论。阅读中遇到兼类词时,读者能立即为其指派句法角色。这种指派过程既可以利用概率制约信息,也可以在句法分析原则指导下进行。句法分析原则是否起作用,取决于概率制约信息的制约强度     

名词与动词加工的ERP差异

采用词汇判断任务和记录ERP的方法,探讨了名词与动词之间的差异以及词汇的具体性对这种词性效应的影响。研究结果表明,在200~300ms、300~400ms（即N400）时窗,词性与具体性的交互作用在两侧电极上达到显著水平,在两半球上具体名词所诱发的ERP比具体动词更负。并且,在N400上词性与电极位置有显著的交互作用,名词与动词的差异主要存在于左、右半球的额叶和颞叶。本研究结果部分支持了语言表征的神经生物学理论     

词汇具体性对情绪名词效价加工影响的ERP研究

具体性和抽象性是词汇同一特性的两极, 是直接影响词汇加工过程的重要因素。本研究采用快速序列视觉呈现范式, 结合脑电技术探讨在有限注意资源内, 词汇具体性对情绪名词加工过程的影响。结果发现：名词加工早期和晚期阶段的ERP成分受到情绪效价的调节, 情绪词比中性词诱发了更大的N170和LPC波幅; 名词加工早期和晚期阶段的ERP成分也受到词汇具体性的调节, 具体词比抽象词诱发了更大的N170和LPC波幅; 词汇具体性影响情绪名词加工的晚期阶段, LPC波幅能够分辨出不同情绪效价的抽象词, 对于具体词仅能区分出情绪与非情绪, 这说明抽象词可能比具体词负载了更多的情绪信息, 反映出对情绪信息的精细加工过程。     

语义信息复杂度对二语者英语被动句加工的影响

采用英语所独有且非常重要的句法结构——被动语态作为语言材料,选取某些可以在句子中的词汇顺序基本没有变化的情况下转换为汉语句式（汉语“被”字句）的“直译型”被动句以及必须根据其意义进行句式转换方能形成相应的汉语句式（汉语主动句）的“意译型”被动句作为实验材料,探讨了在动词语义复杂条件下二语熟练度（包括晚期中等熟练者和高熟练者）对被动句加工过程的影响。结果表明：高熟练者正确率均高于中等熟练者,说明在动词语义复杂的情况下熟练度依然可以预测英语被动句实时加工的程度和水平。此时,语义违例的正确率最高、反应时最短,句法违例句则与之相反。双违例引发的N400效应显著,正确句和句法违例均未引发负向的N400;高熟练者P600的波幅明显高于中等熟练者,句法违例和双违例引发的P600效应最显著。行为指标支持语言间句法加工相似性效应——直译句反应快、正确率高。ERP数据则得出了与之相反的结果：直译句比意译句诱发出更大的N400效应,意译句则引发了较大的P600。上述结果进一步说明二语熟练度对语言间句法加工相似性效应具有很强的调节作用。     

情绪韵律调节情绪词识别的ERP研究

采用韵律/词汇干扰范式和延迟匹配任务, 通过两个ERP实验, 考察了汉语口语中情绪韵律能否、以及如何调节情绪词的识别。实验一中, 不同类型的情绪韵律分组呈现, ERP结果显示, 同与情绪韵律效价一致的情绪词相比, 与情绪韵律效价不一致的情绪词诱发了走向更负的P200、N300和N400成分; 实验二中, 不同类型的情绪韵律随机呈现, 上述效价一致性效应依然存在。实验结果表明, 情绪韵律能够调节情绪词识别, 主要表现在对情绪词的音韵编码和语义加工的双重易化上。     

不同性质的汉语高熟悉度隐喻意义加工过程——来自ERP研究的证据

采用ERP技术考察不同性质隐喻加工的时间进程与神经机制。以词对方式呈现词源性隐喻、引发性隐喻、一般字面义,被试进行语义相关判断任务。结果发现:从引发性隐喻、一般字面义到词源性隐喻,N400平均波幅呈阶梯状递减,引发性隐喻和词源性隐喻的P600平均波幅大于一般字面义。对于不同类型词对诱发的N400,大脑左半球没有显著差异,但右半球上引发性隐喻显著大于词源性隐喻和字面义词对。并且右半球P600平均波幅更大,但三种词对间没有显著差异。结果表明:(1)日常熟悉隐喻的理解更符合平行假说但需要更多的认知资源;(2)右半球是否参与以及参与程度与隐喻性质和加工阶段有关。     

Effect of Representational Distance Between Meanings on Recognition of Ambiguous Spoken Words

Previous research indicates that mental representations of word meanings are distributed along both semantic and syntactic dimensions such that nouns and verbs are relatively distinct from one another. Two experiments examined the effect of representational distance between meanings on recognition of ambiguous spoken words by comparing recognition of unambiguous words, noun–verb homonyms, and noun–noun homonyms. In Experiment 1, auditory lexical decision was fastest for unambiguous words, slower for noun–verb homonyms, and slowest for noun–noun homonyms. In Experiment 2, response times for matching spoken words to pictures followed the same pattern and eye fixation time courses revealed converging, gradual time course differences between conditions. These results indicate greater competition between meanings of ambiguous words when the meanings are from the same grammatical class (noun–noun homonyms) than when they are from different grammatical classes (noun–verb homonyms).     

Hemispheric asymmetry in lexical decisions: the effects of grammatical class and imageability

It has been suggested that neural systems for lexical processing of nouns and verbs are anatomically distinct. The aim of the present study was to investigate if brain asymmetry for the processing of these two grammatical classes is also different. Neurologically intact adults performed a lateralized lexical decision task with grammatically unambiguous words of high, medium, and low degrees of imagery. For error scores a right visual field (RVF) advantage and an overall effect of imageability were obtained. For latency scores grammatical class and imageability modified visual field differences: in the noun class a RVF advantage was obtained only for low imagery nouns, while for the verbs the RVF advantage was present for both medium and low imagery verbs. These results suggest that the participation of right hemisphere neural systems in the processing of verbs is more limited than in the processing of nouns.     

义符在中文名词和动词分类中的作用

通过3个实验,考察了义符在中文名词和动词分类中的作用。实验1表明,义符提供了重要的语法种类信息,在中文名词和动词分类中有重要作用。当义符与词类一致时分类快,与词类相反时对分类起干扰作用。实验2表明,高频词分类时间短,错误率亦低。义符和词频有显著的交互作用,义符对低频词分类作用更大。实验3表明,具体性高的词分类时间短,错误率亦低。义符和具体性之间无显著的交互作用。整个研究表明,义符不仅是结构的“块”,也是语义的“块”,还是语法的“块”。所以如此,与中文名词和动词的结构特点有关。中文名词大多用义符标记事物的物质组成,动词大多用义符标记动作发出的器官或完成动作的工具。义符的语法意义的发现丰富了中文和中文认知的理论,对中文教学也有重要启示     

On the representation of Portuguese gender-inflected words in the mental lexicon

This study aims at verifying whether Portuguese gender-inflected nouns and adjectives are represented as full forms as suggested by Spanish data (Dominguez, Cuetos, & Segui, 1999). A series of lexical decision experiments is reported. Grammatical gender, frequency dominance, and grammatical category are manipulated and cumulative frequency is controlled. The results do not provide support for a full form representation of gender-inflected words. They suggest that grammatical category, or the nature of the inflectional process involved (lexical or syntactic), affects the way words are represented and accessed. Shorter recognition latencies were obtained for nouns drawn from Feminine dominant gender-inflected pairs than from Masculine dominant pairs whereas a tendency in the opposite direction was observed in adjectives. The effect of frequency dominance appears, nevertheless, to be restricted to feminine nouns. The data are compatible with the view that masculine nouns and adjectives are represented as gender-unmarked forms. These results are discussed in relation to current dual-access models of word recognition and to the notion of "interpretability" of lexico-syntactic features, as put forward in the Minimalist Program of Generative Linguistics.     

Shindigs,brunches, and rodeos: The neural basis of event words

Events (e.g., “running” or “eating”) constitute a basic type within human cognition and human language. We asked whether thinking about events, as compared to other conceptual categories, depends on partially independent neural circuits. Indirect evidence for this hypothesis comes from previous studies showing elevated posterior temporal responses to verbs, which typically label events. Neural responses to verbs could, however, be driven either by their grammatical or by their semantic properties. In the present experiment, we separated the effects of grammatical class (verb vs. noun) and semantic category (event vs. object) by measuring neural responses to event nouns (e.g., “the hurricane”). Participants rated the semantic relatedness of event nouns, as well as of two categories of object nouns—animals (e.g., “the alligator”) and plants (e.g., “the acorn”)—and three categories of verbs—manner of motion (e.g., “to roll”), emission (e.g., “to sparkle”), and perception (e.g., “to gaze”). As has previously been observed, we found larger responses to verbs than to object nouns in the left posterior middle (LMTG) and superior (LSTG) temporal gyri. Crucially, we also found that the LMTG responds more to event than to object nouns. These data suggest that part of the posterior lateral temporal response to verbs is driven by their semantic properties. By contrast, a more superior region, at the junction of the temporal and parietal cortices, responded more to verbs than to all nouns, irrespective of their semantic category. We concluded that the neural mechanisms engaged when thinking about event and object categories are partially dissociable.     

The processing of lexical stress during visual word recognition: typicality effects and orthographic correlates

Many studies that have examined reading at the single-word level have been restricted to the processing of monosyllabic stimuli, and, as a result, lexical stress has not been widely investigated. In the experiments reported here, we used disyllabic words and nonwords to investigate the processing of lexical stress during visual word recognition. In Experiments 1 and 2, we found an effect of stress typicality in naming and lexical decision. Typically stressed words (trochaic nouns and iambic verbs) elicited fewer errors than atypically stressed words (iambic nouns and trochaic verbs). In Experiment 3, we carried out an analysis of 340 word endings and found clear orthographic correlates of both grammatical category and lexical stress in word endings. In Experiment 4, we demonstrated that readers are sensitive to these cues in their processing of nonwords during two tasks: sentence construction and stress assignment. We discuss the implications of these findings with regard to psycholinguistic models of single-word reading.     

Neural correlates of comprehension and production of nouns and verbs in Chinese

This paper reports a conjunction analysis between semantic relatedness judgment and semantic associate generation of Chinese nouns and verbs with concrete or abstract meanings. The results revealed a verb-specific task-independent region in LpSTG&MTG, and task-dependent activation in a left frontal region in semantic judgment and the left SMG in semantic associate production. The observation of word class effects converged on Yu, Law, Han, Zhu, and Bi (2011), but contrasted with null findings in previous reports using a lexical decision task. While word class effects in the left posterior temporal cortices have been described in previous studies of languages with rich inflectional morphology, the significance of this study lies in its demonstration of the effects in these regions in a language known to have little inflectional morphology. In other words, differential neural responses to nouns and verbs can be observed without confounding from morphosyntactic operations or contrasts between actions and objects.     

The processing of lexical stress during visual word recognition: Typicality effects and orthographic correlates

Many studies that have examined reading at the single-word level have been restricted to the processing of monosyllabic stimuli, and, as a result, lexical stress has not been widely investigated. In the experiments reported here, we used disyllabic words and nonwords to investigate the processing of lexical stress during visual word recognition. In Experiments 1 and 2, we found an effect of stress typicality in naming and lexical decision. Typically stressed words (trochaic nouns and iambic verbs) elicited fewer errors than atypically stressed words (iambic nouns and trochaic verbs). In Experiment 3, we carried out an analysis of 340 word endings and found clear orthographic correlates of both grammatical category and lexical stress in word endings. In Experiment 4, we demonstrated that readers are sensitive to these cues in their processing of nonwords during two tasks: sentence construction and stress assignment. We discuss the implications of these findings with regard to psycholinguistic models of single-word reading.