工作记忆中汉语反词长效应机制

工作记忆中的反词长效应(reverse word-length effect)指在对长词和短词混合的词表进行即时序列回忆时, 独立长词回忆成绩优于独立短词的现象。以汉字词语为材料通过3个实验探讨反词长效应的机制。实验1采用纯粹词表和长短词混合词表, 既得到纯粹词词长效应, 也得到独立词反词长效应。实验2削弱了长短词之间的词长差异, 结果独立词反词长效应消失, 且独立词回忆成绩优于纯粹词。实验3设计了视觉延迟条件, 得到与实验1类似的结果, 只是独立词反词长效应有所削弱。三个实验的结果并不一致, 无法用现有的语音回路理论或SIMPLE理论进行很好地解释, 理论的整合与创新显得非常重要。因此, 提出多重编码以既相互竞争又相互补充方式进行平行加工的观点进行更完整地解释。     

口吃者的言语计划缺陷——来自词长效应的证据

口吃者与非口吃者在词长效应上的差异是口吃语音编码缺陷的一个重要的支持证据。本研究在综述词长效应研究的基础上,对这种解释提出了三点置疑,即词频、句法复杂性和发音长度也可能是造成词长效应差异的主要原因,并通过三个实验进行了验证。实验一和实验三在口吃者和非口吃者之间都得到了稳定的词长效应差异,并且排除了词频和发音长度对于这种差异的影响;实验二在控制词长的条件下,发现口吃者对于句法复杂性是敏感的。因此,本研究的结果支持口吃在言语产出中的语音编码和句法编码中都存在缺陷。同时,本研究对于口吃治疗也提供了有价值的参考建议     

汉语句子语境对单词识别的效应

本实验采用命名作业对汉语句子语境条件下的单词识别作了初步探索。结果发现:句子语境类型、语境对目标词的限制强度、目标词词频和笔画数对单词识别都产生明显影响;并且语境对单词识到效应的大小也受到语境限制强度、词频和笔画数等的影响。这些结果表明:(1)语境对单词识别的作用点会随着不同的条件而改变;(2)被试在不同的语境限制强度条件下采用了不同的利用语境信息的策略。本研究没有支持核证模型、Logogen模型和双加工理论的一些预测。有关汉语文的语境效应作用机制则有待于进一步的研究。     

记忆的前向测试效应对老年人学习新事物的作用

为检验前置测试是否可以有效地提升老年人学习新事物的能力,参与实验的老年人被随机分为有前置测试的实验组和无前置测试的对照组,在实验1中学习了5列单词,在实验2中记忆了5列日用品,在实验3中学习了4段讲座视频。结果表明,实验组老年人对新事物的记忆成绩均高于对照组的老年人。结论认为,前置测试能够显著提升老年人学习新事物的能力,干扰降低与学习参与相结合的“加减”理论能更好地解释提升老年人记忆的前向测试效应。     

单词再认研究的进展

词是语言的建筑材料。由于语言在人类社会生活和人的心理发展中的重要作用,词成为传递信息的一种重要工具。书面语言中的词是形、音、义的统一体。形、音是词的物质外壳,义是词所标志的客观事物的概念。人们通过对形、音的感知而了解单词的意义,这就是单词再认的问题。研究单词再认,了解人们感知和理解单词的心理学规律,不仅对揭露人的     

快速自动命名对阅读的影响及其作用机制

快速自动命名(Rapid Automatized Naming, RAN)如何影响阅读尚存争议。有研究表明个体单个单词加工效率主导了RAN对阅读的影响。另有研究发现单个单词加工效率和连续加工效率共同作用的“级联”加工过程才是主导RAN影响阅读的主要因素。这与个体视觉注意广度(VAS)起到的调节作用有关。低VAS读者识别正字法单位数量有限,他们在连续阅读时以离散的形式逐个阅读单个单词,单个单词加工效率主导RAN和阅读的关系;高VAS读者将单词视为一个整体,在多个词之间进行连续的并列加工,这种“级联”的加工过程主导了RAN与阅读的关系。未来研究应关注阅读过程中个体的VAS差异,增加阅读材料的复杂性和正字法的不一致性,进一步探究RAN与阅读的关系以及不同水平VAS对它的影响,丰富发展性阅读障碍患者的非语言干预措施相关理论。     

情绪词类型效应：区分情绪标签词和情绪负载词的行为和神经活动证据

情绪标签词直接表达情绪状态, 而情绪负载词本身不表达情绪状态, 但能引发个体的情绪反应。通过对情绪标签词和情绪负载词的相关研究综述发现, 情绪标签词与情绪负载词的加工优势存在不一致的结果; 任务需求、语言类型和词汇特征是导致情绪词类型效应不一致的主要原因; 情绪标签词与情绪负载词的加工差异可以通过语义表征的具身假说、密度假说进行解释。未来研究应深入考察情绪标签词与情绪负载词加工差异的原因; 考察两种词在句子和语篇水平的加工差异; 提供能够直接解释情绪词类型效应的理论假说; 对比中英双语者加工中文和英文情绪标签词和情绪负载词的差异; 采用神经成像技术继续探查情绪信息与语义信息加工的神经机制。     

要点表征与字词表征在错误再认中的作用

关键诱词是指在学习中没有出现的、跟所学单词有一定关联的词。学习者对关键诱词提取时错误再认率(即虚报率)较高,这被称之为错误再认现象。有人认为是要点表征导致了错误记忆,但也有人认为记忆中是字词表征起主要作用。本研究针对要点表征和字词表征对中学生英语单词学习中错误再认的影响进行了2×7的混合设计,分别考查了分类分组呈现单词和随机呈现单词对中学生英语单词再认的影响,同时考查了关键诱词的虚报率与学习次数的关系。发现:(1)学习分类分组呈现单词的被试,对关键诱词的虚报率明显高于学习随机呈现单词的被试,说明要点表征在错误再认中起着重要作用;(2)对关键诱词的虚报率与学习次数之间呈现倒V型的关系,说明在学习初始阶段,要点表征在错误再认中起主要作用;但在学习的后期,字词表征在再认中的作用占据了主要地位。     

英语语音意识在汉语儿童英语单词阅读及拼写中的作用

本研究考察了英语语音意识在小学汉语儿童英语单词读写学习中的作用。对189名小学儿童的研究表明:(1)一、二、五年级在首音和韵脚意识上差异显著;在音位意识上,一、二年级差异不显著,五年级显著高于其他两个年级;(2)各年级儿童的语音意识与其英语单词读写均存在显著相关;(3)控制英语口语词汇量后,一年级的首音意识显著解释其单词读写的变异,二年级的首音意识显著解释其单词拼写的变异,五年级的音位意识显著解释其单词读写的变异;(4)各年级的语音意识对单词拼写较之于阅读都具有更强的变异解释力。可见,小学汉语儿童的英语语音意识与其单词读写存在密切联系,语音意识与拼写的关系相对更为紧密;首音意识对早期读写发展具有重要意义,而音位意识在后期读写学习中的作用更为突出。     

中小学生对于系列材料的长时与短时记忆的实验研究

关于系列材料的长时记忆和短时记忆,国外已有一些研究成果。如Murdock(1962年)研究了词单上的单词数量和每个单词的不同呈现时间对记忆效果有不同的影响;postman和phillips(1965年)研究了从事一项智力活动对刚才记过的词单有干扰作用。     

The time-based word length effect and stimulus set specificity

The word length effect is the finding that short items are remembered better than long items on immediate serial recall tests. The time-based word length effect refers to this finding when the lists comprise items that vary only in pronunciation time. Three experiments compared recall of three different sets of disyllabic words that differed systematically only in spoken duration. One set showed a word length effect, one set showed no effect of word length, and the third showed a reverse word length effect, with long words recalled better than short. A new fourth set of words was created, and it also failed to yield a time-based word length effect. Because all four experiments used the same methodology and varied only the stimulus sets, it is argued that the time-based word length effect is not robust and as such poses problems for models based on the phonological loop.     

Is scanning in probed order recall articulatory?

We consider how theories of serial recall might apply to other short-term memory tasks involving recall of order. In particular, we consider the possibility that when participants are cued to recall an item at an arbitrary position in a sequence, they covertly serially recall the list up to the cued position. One question is whether such “scanning” is articulatory in nature. Two experiments are presented in which the syllabic length of words preceding and following target positions were manipulated, to test the prediction of an articulatory-based mechanism that time to recall an item at a particular position will depend on the number of preceding long words. Although latency was dependent on target position, no word length effects on latency were observed. Additionally, the effects of word length on accuracy replicate recent demonstrations in serial recall that recall accuracy is dependent on the word length of all list items, not just that of target items, in line with distinctiveness assumptions. It is concluded that if scanning does occur, it is not carried out by covert or overt articulation.     

Similarity, global matching, and judgments of frequency

In the test-pair similarity effect, forced-choice recognition is more accurate for similar test pairs, such as leopard-cheetah, than it is for unrelated test pairs, such as leopard-turnip. According to global matching models, this occurs because the retrieved familiarities of similar items are correlated. In the Minerva 2 model, global matching underlies frequency judgments as well as recognition memory. One implication of this model is that judged frequencies of similar items should be correlated. Another implication is that judgments of summed frequency for pairs of words (how many presentations were there of word1 and word2 combined?) should have higher variance when word1 and word2 are similar than when they are unrelated. These predictions were tested and confirmed in two experiments. A review of these and other results suggests that theories of recognition memory should also be applicable to frequency-judgment tasks.     

When does length cause the word length effect?

The word length effect, the finding that lists of short words are better recalled than lists of long words, has been termed one of the benchmark findings that any theory of immediate memory must account for. Indeed, the effect led directly to the development of working memory and the phonological loop, and it is viewed as the best remaining evidence for time-based decay. However, previous studies investigating this effect have confounded length with orthographic neighborhood size. In the present study, Experiments 1A and 1B revealed typical effects of length when short and long words were equated on all relevant dimensions previously identified in the literature except for neighborhood size. In Experiment 2, consonant-vowel-consonant (CVC) words with a large orthographic neighborhood were better recalled than were CVC words with a small orthographic neighborhood. In Experiments 3 and 4, using two different sets of stimuli, we showed that when short (1-syllable) and long (3-syllable) items were equated for neighborhood size, the word length effect disappeared. Experiment 5 replicated this with spoken recall. We suggest that the word length effect may be better explained by the differences in linguistic and lexical properties of short and long words rather than by length per se. These results add to the growing literature showing problems for theories of memory that include decay offset by rehearsal as a central feature.     

Rapid learning of syllable classes from a perceptually continuous speech stream

To learn a language, speakers must learn its words and rules from fluent speech; in particular, they must learn dependencies among linguistic classes. We show that when familiarized with a short artificial, subliminally bracketed stream, participants can learn relations about the structure of its words, which specify the classes of syllables occurring in first and last word positions. By studying the effect of familiarization length, we compared the general predictions of associative theories of learning and those of models postulating separate mechanisms for quickly extracting the word structure and for tracking the syllable distribution in the stream. As predicted by the dual-mechanism model, the preference for structurally correct items was negatively correlated with the familiarization length. This result is difficult to explain by purely associative schemes; an extensive set of neural network simulations confirmed this difficulty. Still, we show that powerful statistical computations operating on the stream are available to our participants, as they are sensitive to co-occurrence statistics among non-adjacent syllables. We suggest that different learning mechanisms analyze speech on-line: A rapid mechanism extracting structural information about the stream, and a slower mechanism detecting statistical regularities among the items occurring in it.     

Irrelevant speech eliminates the word length effect

Theword length effect refers to the observation that memory is better for short than for long words. Theirrelevant speech effect refers to the finding that memory is better when items are presented against a quiet background than against one with irrelevant speech. According to Baddeley’s (1986, 1994) working memory, these variables should not interact: The word length effect arises from rehearsal by the articulatory control process, whereas irrelevant speech reduces recall through interference in the phonological store. Four experiments demonstrate that, like articulatory suppression, irrelevant speech eliminates the word length effect for both visual and auditory items. These results (1) provide further evidence against the ability of working memory to explain the word length and irrelevant speech effects and (2) confirm a specific prediction of Nairne’s (1990) feature model.     

Temporal Grouping Effects in Immediate Recall: A Working Memory Analysis

The presence of temporal pauses during list presentation can markedly improve immediate memory for a sequence of verbal items. A series of experiments analysed this effect using Baddeley's (1986) model of working memory. Experiment 1 showed that the effect of temporal grouping on memory for visual sequences was removed by either articulatory suppression or reciting random digits. Experiment 2 indicated that effects of temporal grouping were insensitive to the word length of the items. Experiment 3 showed that articulatory suppression did not remove the temporal grouping effect for auditory lists. Experiment 4 showed that the temporal grouping effect was insensitive to the phonemic similarity of the items. The effects of concurrent articulation suggest that grouping influences the phonological loop component of working memory. However, the working memory model is insufficiently well specified to account for the insensitivity of grouping effects to word length and phonemic similarity. The main findings could be simulated by a connectionist model of the phonological loop, which invokes a context timing signal (Burgess & Hitch, 1992, in press), This assumed that pauses during list presentation affect the timing signal in a similar way to the pause before list presentation and made some novel predictions.     

Dual Processing of Open- and Closed-Class Words

A series of articles in the past two decades has suggested differential processing of open- and closed-class lexical items by normal adults. Difficulties in replicating a crucial study (Bradley, 1978), however, have weakened the dual route hypothesis. We matched 16 French open-class items to 16 closed-class items for phonological structure, word length, and relative word frequency. Three agrammatic aphasics were asked to read each word in isolation and in a sentence context. Error analysis revealed strikingly more phonological errors on closed-class than open-class items. Dysfluencies were greater on closed-class items and contributed to greater overall reading time for the closed-class words, consistent with a two-route model for the production of closed- and open-class lexical items in Broca's aphasics and, thus, normals.     

Backward recall and the word length effect

The word length effect, the finding that words that have fewer syllables are recalled better than otherwise comparable words that have more syllables, is one of the benchmark effects that must be accounted for in any model of serial recall, and simulation models of immediate memory rely heavily on the finding. However, previous research has shown that the effect disappears when participants are asked to recall the items in strict backward order. The present 2 experiments replicate and extend that finding by manipulating the participant's foreknowledge of recall direction (Experiment 1) and by giving the participant repeated practice with one direction by blocking recall direction (Experiment 2). In both experiments, a word length effect obtained with forward but not backward recall. The results are problematic for all models that currently have an a priori explanation for word length effects. The finding can be accounted for but is not predicted by Scale-Independent Memory, Perception, and Learning (SIMPLE), a model in which item and order information are differentially attended to in the 2 recall directions.     

Concerning the role of perceptual factors in the serial position effect

The experiment described here addresses itself to the serial position effect of recall, and in particular to the cause of primacy. Two of the three theories discussed here (selective rehearsal and proactive interference) postulate competition between items during the storage interval as a cause of primacy, acquisition being assumed to be equal for all items. The third theory (differential perceptual processing) places the locus of the effect prior to the storage stage, and does not hold interactions between items to be essential to the effect after encoding. The experiment used this distinction between the two classes of theories, storage of the whole presentation (and hence interactions during storage) not being required. Only one word from each list was recalled, and this item was indicated to S on presentation, thereby eliminating the necessity to attempt to encode all items. The storage-interaction theories predict no primacy for the recall of individual items in this experiment, but the initial member of the list was recalled more often than the third member. This example of primacy lends support to the argument that the trace strengths of items are not always equal immediately after presentation.