4—11岁儿童数学概念稳定性的发展的研究

设计了四组试验项目,每组3或5个难度不同的项目,在掩盖操作和不掩盖操作条件下分别检查儿童数、长度、面积、体积等概念的稳定性。全国13个地区每地区以“临床法”个别试验4—6岁儿童每年龄组30人,或7—11岁儿童每年龄组20—30人。总的结果初步表明:儿童数学概念的稳定性随年龄而发展,表现于解答课题的成绩和解答过程的认知水平两个方面。数学概念稳定性的发展因课题的类型和难易而异其先后。数学稳定性在不掩盖操作条件下表现高于在掩盖操作条件下。在不掩盖操作演示的启发下,掩盖操作条件下的成绩有提高。这两者都是在相应数学概念正处于发展中的阶段比较明显。在文化条件相等的情况下未发现儿童数学概念稳定性的民族差异和性别差异。儿童数学概念稳定性发展的顺序似乎是数、长度、面积、体积。作者认为,数学概念从不稳定到稳定有一个发展过程;稳定性本身不是绝对的,而是有条件的,并非出现于特定的年龄。     

材料模式与认知负荷对小学生类比学习的影响

探讨学习材料不同模式和学习过程不同的认知负荷对小学生类比推理学习迁移的影响.包括两个分实验.实验1探讨学习材料的不同组织模式对小学生类比推理学习迁移的影响,两组小学生分别学习模式化与非模式化的材料,然后完成迁移程度远近不同的四类测题.结果表明,非模式化条件下完成远迁移题目的成绩显著优于模式化条件下的成绩.实验2探讨小学生在不同认知负荷条件下类比推理学习的迁移效果,两组小学生分别在高认知负荷与低认知负荷情况下学习类比推理的材料,然后完成上述四类测题.结果表明,高认知负荷条件下完成远迁移题目的成绩显著优于低认知负荷条件下的成绩.本实验结果表明,对于小学生类比推理的学习来说,非模式化、高负荷的学习更有利于促进迁移,支持了积极反应理论.     

工作记忆容量研究新进展

工作记忆容量作为直接影响人类完成高级认知活动的重要因素而倍受心理学家的关注.长期以来关于工作记忆容量的研究主要集中于工作记忆的执行性控制成分与高级认知活动的关系上,忽略了对注意焦点的研究,而注意焦点则是为了进行当前的认知加工而把从记忆的激活部分提取出来的信息组块加以保持的一个容量有限系统.该文作者讨论了关于工作记忆中注意焦点容量的研究及认识,并指出了当前研究中存在的问题.     

蒙氏教育法对学前儿童数认知能力影响研究

本研究通过比较采用不同教育方式的蒙氏组和普通组4～6岁三个年龄段的180名温州地区幼儿园儿童数认知能力以探查蒙特梭利教育方式对学前儿童数认知能力的影响.研究结果表明:(1)幼儿对数的认知成绩都有随年龄发展的趋势;(2)3种不同的认知条件下,采用蒙氏教育法的幼儿认知成绩均优于同年龄阶段普通教育方法下的幼儿;(3)蒙氏组的解题水平均优于普通组;研究结果为蒙特梭利教育方式在中国现行教育体系中是否值得推广提供参考依据.     

听觉词源记忆与再认记忆的差异性研究

该项研究探讨被试对听觉词源检测和再认的差异性,并比较了男女被试的源检测和再认情况.实验以两字汉字词为记忆材料,设计了三个因素.性别因素指男女被试性别水平;声源因素设计了男性和女性两种声源呈现听觉词,为组内设计;学习因素为两个水平的组内设计,水平一是偶然学习,水平二是重复学习,也为组内设计,该因素考查学习效应.研究分别统计两种声源词的再认和源检测成绩,结果分析显示:被试源检测的学习效应显著,而再认的学习效应不显著;两种声源词的源检测差异显著,而再认的差异不显著;同类测试之间存在显著相关,两种测试之间相关不显著;偶然学习条件下,男女被试对男性声源词的源检测差异显著.研究结果提示,源检测的内部认知过程不同于再认,并且两种性别人群的源记忆可能存在某些方面的差异.     

小学儿童在空间概念中的内隐学习

本研究以一、三、五年级小学儿童为被试,探查小学儿童在不同学习模式下空间概念的发展情况。研究结果如下:(1)不同学习模式下,儿童的认知发展呈现不同的趋势;(2)随认知任务难度的增加,不同学习模式的成绩出现差异;(3)不同学习模式下,不同难度任务的成绩存在差异。     

小学儿童在空间概念中的内隐学习实验研究

本研究以一、三、五年级小学儿童为被试,探查小学儿童在不同学习模式下空间概念的发展情况。研究结果如下:(1)不同学习模式下,儿童的认知发展呈现不同的趋势;(2)随认知任务难度的增加,不同学习模式的成绩出现差异;(3)不同学习模式下,不同难度任务的成绩存在差异。     

儿童相差概念形成过程的实验研究

两数相差概念是小学低年级教学中的一个难点和重点。掌握这概念的关键在于儿童对两数相比的认识,为此,我们设计了由易到难对数进行比较的三组试题测试儿童。结果得知,两数相差概念的获得,首先要建立两数“同样多”的概念。同时知道儿童掌握两差概念的发展过程是由具体外表到抽象认识;从被动直观到能主动操作;从直接认知到间接认知。     

伴随学习的周围气味影响记忆成绩的实验研究

本研究通过两个实验证明周围气味对回忆成绩的影响因气味的性质而不同:愉快气味伴随学习和回忆时,愉快气味作为提取线索,从而提高记忆成绩;不愉快气味伴随学习时,不愉快气味能激发人的学习动机,提高人的兴奋性,从而提高记忆成绩。同时也对气味想象指令和关于与气味相关材料的记忆情况进行了研究。     

现代认知心理学关于概念获得的某些研究

人是怎样获得一个概念或掌握一个概念的?这个问题历来是心理学在研究人的思惟和学习时所关心的问题。现代认知心理学对这一问题也有一些研究。什么是概念?有的认知心理学者提出,人们用以表现一个范畴的心理结构便叫做概念(Moates等,1980,P.208)。概念是抽象的,它代表一类事物,而不是指这类事物的任     

Identification and conceptualization of procedural chunks in chess

When it comes to cognitive architecture and human information processing, chunks are one of the best known and most recognized constructs. Nevertheless, the nature of chunks is still very elusive, especially when it comes to chunks in procedural knowledge. This study deals with basic features of procedural information processing and examines the manifestation of chunks in procedural knowledge. The participants' task was to reconstruct sequences of chess moves. Chess was chosen as an experimental domain, because of its complexity, well-defined rules and standardized measure of chess player strength. From the results we conclude that short-term memory capacity is determined by the combination of the size and amount of procedural chunks recalled to the short-term memory. We have shown that on average, participants with more specialized knowledge operated faster and with larger chunks of procedural information than participants with less specialized knowledge. We have shown that in procedural information processing, the level of expertise and the sorting order of the retrieved information are important factors that influence the amount of procedural chunks retained in the short-term memory. Therefore, the capacity of short-term memory in complex situations cannot be expressed as a simple concept.     

On the Role of Fragmentary Knowledge in a Sequence Learning Task

There has been considerable debate about whether or not we need to distinguish between the acquisition of implicit-and, independently thereof, the acquisition of explicit-knowledge in sequence learning tasks. Proponents of the view that a unitary knowledge base is formed assume (a) that the knowledge acquired is explicitly available, and (b) that information about sequence fragments forms the core of this explicit knowledge. Both of these issues are addressed empirically in the present article. In two experiments, an adapted process dissociation procedure and a suitable measurement model were used to separate recollective (explicit) and fluency-based (implicit) memory processes in a sequence learning task. Experiment 1 demonstrated that fluency-based processes came into play much later than recollective processes. Such recollective processes have been conceptualized as being based on simple knowledge about sequence fragments or chunks. Indeed, Experiment 2 showed that recollective processes are more likely to contribute to sequence judgements if chunks are readily available at test than if they are not. Together, these results are in line with the view that the learning of an event systematicity can be conceived of as the memorization of chunks of events that support both the speedingup of reaction times to systematic events and explicit, recollective memory processes even after relatively little training.     

Implicit learning of complex information in amnesia

Implicit learning abilities of nine amnesic patients were explored by using an artificial grammar learning task in which the test strings were constructed in such a way that grammaticality judgments could not be based on a simple knowledge of bigrams and trigrams (chunks). Results show that amnesic patients and controls performed at the same level during the classification task, whereas amnesic patients performed worse than controls in an explicit generation task. Moreover, there was no correlation between the implicit and explicit measures. These results are compatible with the existence of two kinds of representation intervening in artificial grammar learning. The first one based on processes leading to fragment-specific knowledge (the chunks, which can be accessed explicitly), and the second based on the learning of simple associations and more complex conditional relations between elements.     

Kompositionsbildung bei Symbolfolgen und Bediensequenzen: Empirische Befunde und die Theorie des „Competitive Chunking”

In the paradigm of artificial grammar learning subjects have to reproduce regularly structured sequences of symbols. In a subsequent and unexpected test, they have to discriminate sequences that correspond to those of thememorization task from sequences that do not. Discriminability of grammatical and nongrammatical strings is judged as evidence for unconscious learning. This effect has been explained by the creation of chunks: Memorization of strings is facilitated by composing elements to chunks. The hierarchical organization of these units allows the representation of grammatical strings by a few high level chunks. The fewer chunks are necessary to represent a given string the higher is its familiarity and the probability to be judged grammatical. For the incidental acquisition of knowledge about operating a device the creation of chunks could also be shown. In contrast to letter series, two peculiarities were found: (a) discriminability was rather low, (b) irregularities at the end of input sequences were most effective. These peculiarities dissappeared, if — similar to letter strings — the information about a single operation of a sequence was permanently available. In the present simulations it was investigated whether these effects are consistent with the theory of competitive chunking. The temporal grain within sequences was varied to investigate the impact of the availability of sequential information on discriminability. Three different modes of chunk creation were simulated in the test phase to investigate whether the creation of chunks is obligatory for perceptual integration or requires a memorization task. The variation of temporal grain had only a marginal impact on discriminability. The simulation of the empirical data required that grammatical chunks are created within the test phase. Implications of these findings are discussed.     

人工语法范式下的无意识知识探析

人工语法范式不仅是内隐学习领域广泛运用的范式,同时也是研究无意识知识的主要方法。文章通过对人工语法范式组成材料中的刺激频率、组块等方面进行深入探讨,不仅使人们对无意识知识有了更全面的认识,而且也有利于对内隐学习获得规则知识的假设提出更确定的回答;并通过对无意识知识的神经机制研究以及考察镜射规则学习过程的脑神经激活状况,获得了规则学习对应更为准确的脑神经活动,推动了人工语法范式下无意识知识的深入研究。     

内隐序列学习中转移组块的数量和位置效应

表征质量理论对意识增长持渐进观点,忽视新异刺激对意识的突变式影响;新异刺激理论强调意识突变,忽视新异刺激本身的表征质量增长。本研究采用经典确定性内隐序列学习范式,将转移组块作为新异刺激,操控其数量和位置,探究新异刺激如何通过表征质量来影响内隐学习和意识。结果表明：（1）数量效应显著,即两个转移组块更能促进内隐学习量,说明新异刺激本身需要足够的表征质量才能发挥“意外事件”的作用。（2）在位置效应上,两个转移组块且靠前的设置更能提高受控意识,表明第一个新异刺激必须出现在原序列初级表征质量阶段,才能使被试对新异刺激和原序列进行对比,加之第二个新异刺激的与之呼应,促进原序列意识增加。     

Age-related differences in immediate serial recall: Dissociating chunk formation and capacity

We assessed the contribution of two hypothesized mechanisms to impaired memory performance of older adults in an immediate serial recall task: decreased temporary information storage in a capacity-limited mechanism, such as the focus of attention, and a deficit in binding together different components into cohesive chunks. Using a method in which paired associations between words were taught at varying levels to allow an identification of multiword chunks (Cowan, Chen, & Rouder, 2004), we found that older adults recalled considerably fewer chunks and, on average, smaller chunks than did young adults. Their performance was fairly well simulated by dividing attention in younger adults, unlike what has been found for long-term associative learning. Paired-associate knowledge may be used in an implicit manner in serial recall, given that younger adults under divided attention and older adults use it well despite the relatively small chunk capacities displayed by these groups.     

Visual statistical learning produces implicit and explicit knowledge about temporal order information and scene chunks: Evidence from direct and indirect measures

We examined whether visual statistical learning (VSL) produced implicit and/or explicit knowledge about temporal order information and scene chunks, using a rapid serial visual presentation target detection task and a two-alternative forced-choice (2AFC) familiarity test as indirect and direct measures of VSL, respectively. In the familiarization phase, participants viewed a visual stream of natural scenes consisting of four triplets (i.e., three images that always appeared in the same order). In the subsequent target detection task, participants were required to detect target items embedded in a stream of 12 images or 12 words representing each natural scene. In the final 2AFC familiarity test, participants observed two test sequences (statistically related triplets vs. unrelated foils) and decided whether the first or second sequence was more familiar based on the familiarization phase. In both test phases, we included the same (forward) and reverse (backward) order of scenes as presented during the familiarization phase to examine whether the expression of VSL was based on temporal order of scenes or scene chunks. The results of the target detection task showed a learning effect for both temporal order in the forward condition and chunks in the backward condition, irrespective of whether stimuli were images or words; in contrast, we did not observe a learning effect in the backward condition for scene images in the familiarity test. Our findings are compatible with a learning mechanism that has both implicit and explicit components based on temporal order information and scene chunks.     

Diminished motor skill development in elderly: Indications for limited motor chunk use

The present study examined whether elderly use motor chunks after practicing discrete keying sequences, just like young adults, or whether they perhaps learn these movement patterns in a different way. To that end, elderly (75-88) and young adults (18-28) practiced as part of the discrete sequence production (DSP) task two fixed series of three and six key presses. The results demonstrate that elderly did improve with practice but this improvement was largely sequence-unspecific. Detailed analyses showed that, in contrast to young adults, most elderly did not use motor chunks, had little explicit sequence knowledge, and remained highly dependent on external stimuli. Still, elderly did show sequence-specific learning with a 6-key sequence that can be explained by an associative learning mechanism.     

Differences in the types of musical regularity learnt in incidental- and intentional-learning conditions

Several studies have found learning of biconditional grammars only under intentional rule-search conditions (e.g., Johnstone & Shanks, 2001). Memorization of strings merely led to the learning of chunks. We used a musical grammar, a diatonic inversion, that is a type of biconditional grammar. Participants either were required to memorize a set of grammatical tunes (incidental learning), or were asked to search for the underlying rule whilst being given feedback about their performance (intentional learning). The results showed that participants in the incidental-learning condition did not learn the inversion rule and merely acquired explicit knowledge about chunks. However, participants in the intentional-learning condition learnt both the inversion rule and chunks.