领域知识与自我解释策略间关系的实验研究

从领域知识的个体差异的角度,研究领域知识与自我解释策略之间的关系,探讨自我解释在示例学习中的作用。研究结果表明,（１）在学习示例时,高领域知识组被试倾向于使用发现意义和建立新旧信息间联结的解释策略对示例进行认知加工;低领域知识组被试主要采用句法加工策略对示例进行加工;（２）领域知识对监控活动的制约,主要体现在被试监控到理解失败之后所采取的对策上。高领域知识组被试利用解释策略解决问题,低领域知识组被试利用句法加工策略解决问题。     

提取练习在记忆保持与迁移中的优势效应：基于认知负荷理论的解释

提取练习比建构概念图更有利于记忆保持和迁移的研究结果尚存在争议。依据认知负荷的3个成分,设计两个实验探究前期知识水平与策略复杂性对以上两种学习策略有效性的影响。结果表明：(1)前期知识水平的主效应不显著,但是与学习策略之间存在交互作用：在提取练习策略条件下,高前期知识水平的被试与低前期知识水平的被试在记忆保持和迁移上的正确率没有显著差异,但是在建构概念图策略条件下,高前期知识水平的被试在记忆保持和迁移上的正确率显著地高于低前期知识水平的被试;(2)当降低概念图的难度后,被试使用建构部分概念图策略产生的认知负荷与使用提取练习策略相比显著降低,并且其在学习阶段学习到的知识量显著地高于使用提取练习策略的结果,但是在最终测试上,其记忆保持与迁移的正确率与使用提取练习策略并没有显著差异,策略的复杂性增加了学习者的额外负荷,但是对策略有效性的发挥却不具有决定性影响。以上结果说明提取练习策略之所以比建构概念图策略更具优势,不是因为其策略本身更易掌握,而是因为其与建构概念图策略相比不受学习者前期知识水平的影响。这意味着认知负荷理论可以很好地解释提取练习在记忆保持与迁移中产生优势效应的内部机制,并进一步证实提取练习与精细编码不同,具有独特的加工机制。     

序列位置内隐学习产生机制的实验研究

内隐学习是当今认知和学习领域继内隐记忆之后又一重要的研究课题。该研究利用序列反应时研究程式,通过两个实验,对序列位置内隐学习产生的机制进行了探讨。结果表明：（１）在序列反应时任务程式中,随着反应一刺激间隔的延长,序列位置内隐学习的学习量逐渐减少;（２）异形同模式迁移组和异形异模式迁移组被试间内隐学习量无显著差异,被试未能内隐地习得抽象的序列模式。说明序列位置内隐学习产生的基础是水平联结,在该实验条件下没有发现垂直联结存在的证据。     

基于选择反应的学习迁移效应：从个人情境到社会情境

先前习得的空间不相容联结可以减少、消除甚至反转Simon效应, 这种现象被称为学习迁移效应。研究者已经在个人情境和社会情境中发现一些影响学习迁移效应的因素, 并提出短时记忆联结解释、自下而上的启动机制和反应对立策略等相关解释。未来研究需要澄清刺激-反应迁移的双向性以及学习迁移效应的认知神经机制和发展路径。     

关于人工语法学习迁移效应的一项实验研究

本研究探讨了人工语法迁移效应产生的机制,着重考查了组块信息迁移理论对人工语法迁移效应机制解释的适宜性。结果发现：当学习和测验序列的表层结构不同时,被试能够学习和迁移非重复成分间的序列依存性(实验一);当被试将非重复成分间的序列依存性迁移到表层结构不同的测验序列中时,需要在学习和测验序列的分布特征上形成一种匹配(实验二)。     

小学生阅读迁移机制的进一步研究--字词表征还是内容表征

探讨阅读文章难易程度与文章字词和内容在小学生篇章阅读迁移中的作用。被试分为阅读水平高、低两组。采用个别方式施测,以阅读时间和阅读准确性为阅读迁移的指标。结果表明,低水平组被试的篇章阅读迁移主要依赖词汇表征;高水平组被试的篇章阅读迁移主要依赖内容表征,换言之,容易文章主要以内容表征进行迁移;困难文章主要以词汇表征进行迁移。     

自我解释与工作记忆对汉语阅读理解的影响

采用组间实验设计,以汉语科技说明文为阅读材料,探讨自我解释与工作记忆对汉语阅读理解的影响以及工作记忆对自我解释活动本身的影响.结果表明:(1)自我解释活动促进了被试对文本的理解.(2)较高的言语工作记忆容量对汉语阅读理解有促进作用.(3)高工作记忆容量组比低工作记忆容量组不仅在阅读过程中产生了更多数量的自我解释,而且还更多地使用衔接和推理的解释模式.     

认知信息的详尽度与锚定对决策策略的影响

以191名大学生为被试,采用2×3的完全组间设计,探讨不同认知信息详尽度和有无锚定材料条件下大学生决策策略类型的选择。结果发现:(1)认知信息详尽度对被试的决策策略选择的影响显著,被试在低认知信息详尽度水平下倾向于选择采用维度比较策略,而在高认知信息详尽度水平下倾向于选择采用综合比较策略,并且倾向程度差异显著。(2)锚定效应对决策策略选择的影响不显著,认知信息详尽度与锚定的交互作用也不显著。     

基于计算机的反馈复杂性和先前知识对学习的影响

采用两因素实验设计探索计算机环境下精细反馈的复杂性和先前知识对学习的影响。106名具有高或低先前知识的大学生被随机分配到线索和详细解释两种复杂程度不同的反馈条件下进行学习,在学习过程中和学习结束之后分别测量学习者对反馈内容的外在认知负荷评价、迁移成绩、反馈知觉和动机。结果发现:(1)反馈复杂性只影响低先前知识者的学习迁移,他们在详细解释条件下的迁移成绩显著高于线索条件。高先前知识者的迁移成绩高于低先前知识者。(2)反馈复杂性和先前知识都显著影响学习者对反馈内容的外在认知负荷评价,详细解释条件引发了更低的外在认知负荷,高先前知识者感知到更低的外在认知负荷。(3)先前知识影响学习者的反馈知觉,高先前知识者的反馈知觉更好;但反馈复杂性只影响低先前知识者的反馈知觉,他们在详细解释条件下产生了更好的反馈知觉。(4)反馈复杂性和先前知识促进学习者的动机。     

跨领域项目间联结记忆中项目提取和关系提取的分离：一项事件相关电位研究

使用ERPs技术, 探讨跨领域项目间联结记忆中项目提取和关系提取的差异。学习阶段, 系列呈现面孔-事件动词材料, 让被试识记面孔、事件动词以及两者之间的关系; 测验阶段, 要求被试对成对刺激进行“相同”、“重组”或“新”判断。结果发现：提取阶段, 刺激呈现后约200 ms, “相同”、“重组”和“新”3种条件下的ERPs开始出现分离, 存在“相同/新”、“重组/新”和“相同/重组”三类新旧效应。在200~300 ms, “相同/新”和“重组/新”两类新旧效应表现在前额和额区皮层; 在300~500 ms, 这两类新旧效应广泛地分布在从前到后各个脑区皮层; 在500~700 ms, “相同/新”新旧效应出现在额-顶区皮层, 而无“重组/新”新旧效应; 在700~1400 ms, 这两类新旧效应发生在前额和额区皮层; 在上述4个时段, “相同/重组”关系新旧效应都发生在额中-中央-顶区皮层。从这些结果可以推知：跨领域项目间联结再认中, 项目新旧效应和关系新旧效应同时出现, 但是关系提取比项目提取较晚完成; 额中-中央-顶区皮层关系新旧效应反映了对项目间关系的回忆加工; 而700 ms以后, 前额、额区皮层新旧效应可能反映了项目之间关系提取过程的执行加工功能。     

学习不良儿童的策略信念与理解水平

使用结构访谈法对120名儿童(其中学习不良儿童60名)的策略信念与策略理解水平进行了研究。结果显示:学习不良儿童组与一般儿童组的差异更多体现在对具体策略的元认知因果解释水平上,他们更多持有较低水平的“信息获得”解释,而对照组儿童则更多持有较高水平的“信息加工”解释,提示对策略理解水平的差异可能是导致学习不良儿童难以将新学到的策略主动应用到其它情景中去的一个重要原因。     

The role of strategy utility knowledge in children's strategy decision making

Ten- to thirteen-year-olds selected between two methods for learning vocabulary meanings, the objectively more effective keyword method and a naturalistic context method. The main hypothesis of the study was that children produce relative strategy efficacy knowledge during practive with strategies but that children may fail to use this knowledge to direct maintenance of the more effective strategy. To evaluate this position, control subjects selected between the keyword and context strategies without the benefit of practice. In three other conditions subjects practiced the techniques before making strategy choices. Simple practice did not increase keyword-method selection. Practice combined with a prompt to think back to performance with the two strategies during practice increased keyword selection to a high level, comparable to keyword selection when subjects were given explicit feedback about keyword superiority immediately before strategy selections were made. Supplementary analyses supported the conclusion that even in the absence of explicit performance feedback, children can be induced to reflect on their use of strategies and the outcome of those strategic actions in a fashion as to affect their subsequent cognitive actions, in this case, strategy choices. The data are discussed with reference to other work on monitoring and metamemorial effects on cognition.     

Leave Her out of It: Person‐Presentation of Strategies is Harmful for Transfer

A common practice in textbooks is to introduce concepts or strategies in association with specific people. This practice aligns with research suggesting that using “real‐world” contexts in textbooks increases students’ motivation and engagement. However, other research suggests this practice may interfere with transfer by distracting students or leading them to tie new knowledge too closely to the original learning context. The current study investigates the effects on learning and transfer of connecting mathematics strategies to specific people. A total of 180 college students were presented with an example of a problem‐solving strategy that was either linked with a specific person (e.g., “Juan's strategy”) or presented without a person. Students who saw the example without a person were more likely to correctly transfer the novel strategy to new problems than students who saw the example presented with a person. These findings are the first evidence that using people to present new strategies is harmful for learning and transfer.     

The Effectiveness of Instruction in Cognitive Strategies in Developing Proficiency in Single-Digit Addition

This study compared the relative effectiveness in developing proficiency in single digit addition of direct instruction in cognitive strategies with practice activities designed to facilitate invented strategies. Forty children were matched on sex and written pretest scores and were randomly assigned to either strategy instruction or practice. Posttesting was conducted after 12 weeks of instruction. A delayed posttest was conducted after another 8 weeks. On all dependent measures, the children from the practice group performed as well as, or better than, the strategy instruction group. Although approximately equal numbers of children from each group were detected using the strategies, the practice group used them more effectively. The data indicate that practice produced more effective learning and more effective strategy use.     

记忆编码策略对心境一致性记忆的调节作用

情绪对记忆的影响会受记忆编码策略的调节。本研究通过2个实验探讨编码策略对心境一致性记忆的调节作用。实验1和实验2均采用2（编码策略：提取练习策略、重复学习策略）×2（词性：消极词、中性词）的实验设计,分别探讨了不同记忆编码策略对普通大学生（实验1）和非临床抑郁大学生（实验2）心境一致性记忆的影响。结果发现：无论是被成功诱导出抑郁情绪的普通大学生,还是非临床抑郁倾向大学生,使用重复学习策略时回忆出的消极词均显著多于中性词,表现出显著的心境一致性记忆,而使用提取练习策略时回忆出的消极词和中性词没有显著性差异,未表现出心境一致性记忆。实验结果表明,记忆编码策略对心境一致性记忆具有调节作用,提取练习策略能够抑制心境一致性记忆。研究结果指明了心境一致性记忆的边界条件,并对非临床抑郁个体的学习与记忆具有重要的启示。     

大学生英语学习策略使用特点及发展趋势研究

采用自编问卷对493名不同背景大学生英语学习策略的调查发现,大学生内隐学习策略显著低于外显策略,表明我国大学生英语学习以外显为主;外显策略中,社会/情感策略水平最高,而元认知策略水平最低;英语学习策略的使用在性别、英语学习难易程度的主观判断以及学业成就水平等因素上呈现出明显的差异性特点,女生的策略使用率总体高于男生,英语学习成就越高以及英语学习认知越积极的学生学习策略使用率越高;大学生英语学习策略的发展呈V型趋势,在大三低至谷底,男生的策略波动幅度显著大于女生。     

Understanding strategy differences in a fault-finding task

This article examines strategy choices for how people find faults in a simple device by using models of several strategies and new data. Diag, a model solving this task, used a single strategy that predicted the behavior of most participants in a previous study with remarkable accuracy. This article explores additional strategies used in this reasoning task that arise when less directive instructions are provided. Based on our observations, five new strategies for the task were identified and described by being modeled. These different strategies, realized in different models, predict the speed of solution while the participant is learning the task, and were validated by comparing their predictions to the observations (r² = .27 to .90). The results suggest that participants not only created different strategies for this simple fault-finding task but that some also, with practice, shifted between strategies. This research provides insights into how strategies are an important aspect of the variability in learning, illustrates the transfer of learning on a problem-by-problem level, and shows that the noisiness that most learning curves show can arise from differential transfer between problems.     

An Inhibitory Learning Approach to Cognitive-Behavioral Therapy for Children and Adolescents

Although exposure-based cognitive-behavioral therapy (CBT) is efficacious for childhood anxiety and obsessive–compulsive disorder (OCD), many youth do not adequately respond to treatment. Extinction learning is an important process in exposure-based CBT. However, youth with anxiety disorders and OCD exhibit impairments in extinction processes that are best characterized by deficits in inhibitory learning. Therefore, the utilization of strategies to optimize inhibitory learning during exposures may compensate for these deficits, thereby maximizing extinction processes and producing more robust treatment outcomes for exposure-based CBT. This paper reviews several strategies to optimize inhibitory learning in youth with anxiety disorders and OCD, and presents practical examples for each strategy. This paper also highlights the difference between inhibitory learning-based exposures and prior conceptual approaches to exposure therapy in clinical practice. It concludes with a discussion of future directions for clinical research on inhibitory learning and exposure-based CBT in youth.     

An individual differences analysis of ability and strategy influences: age-related differences in associative learning

The relationships among abilities, strategies, and performance on an associative learning task were investigated for young (aged 17 to 34) and older adults (aged 60 to 82). Participants received extensive practice on a noun-pair task in which they could use a visual-scanning strategy or a memory-retrieval strategy. Older adults were more likely to use the scanning strategy. Age differences were reduced when comparisons were made only for participants using a retrieval strategy. Associative memory was predictive of learning on the task, and semantic memory access speed was predictive of practiced performance. Practiced performance on a memory-search task that also required associative learning was predictive of practiced noun-pair performance. Models of ability-performance relationships for skill acquisition are discussed.     

An effective metacognitive strategy: learning by doing and explaining with a computer‐based Cognitive Tutor

Recent studies have shown that self‐explanation is an effective metacognitive strategy, but how can it be leveraged to improve students' learning in actual classrooms? How do instructional treatments that emphasizes self‐explanation affect students' learning, as compared to other instructional treatments? We investigated whether self‐explanation can be scaffolded effectively in a classroom environment using a Cognitive Tutor, which is intelligent instructional software that supports guided learning by doing. In two classroom experiments, we found that students who explained their steps during problem‐solving practice with a Cognitive Tutor learned with greater understanding compared to students who did not explain steps. The explainers better explained their solutions steps and were more successful on transfer problems. We interpret these results as follows: By engaging in explanation, students acquired better‐integrated visual and verbal declarative knowledge and acquired less shallow procedural knowledge. The research demonstrates that the benefits of self‐explanation can be achieved in a relatively simple computer‐based approach that scales well for classroom use.