学习和测验经验对学习判断中UWP效应的影响

针对重复学习判断中出现的练习伴随低估效应（UWP效应）,目前存在多种理论解释。本研究基于过去测验记忆假说,在学习阶段和测验阶段引入两种判断：学习判断准确性的判断和回溯性信心判断,通过两个实验考察学习经验和测验经验对UWP效应的影响。结果发现：在学习判断中学习判断准确性的判断和回溯性信心判断均消除了UWP效应,间接证明了学习和测验经验均影响到UWP效应的出现。     

重复学习判断中的低自信效应

学习判断是元认知判断的一种重要形式,是对未来回忆成绩的预测。重复学习判断中的低自信效应是一个有趣而反常的现象,指在重复学习测验中,学习判断往往低估了回忆成绩的增加,出现低自信的一种现象。目前,大部分实验证据支持重复学习判断中的低自信效应是普遍存在的,但也有一些实验结果表明该效应是受一定条件限制的。对于这种低自信效应的作用机制,研究者提出了不同的理论模型（如,锚定调整假说、记忆偏向消除理论、过去测验记忆的启发式假说等）进行了深入探讨。最后,文章还指出了此领域现有研究的局限和有待研究的问题     

学习次数和材料难度对学习判断绝对准确性的影响

本研究采用5（学习次数）×2（材料难度）被试内设计,考察材料难度和学习次数对即刻和延迟学习判断绝对准确性的影响。45名大学生被试参加实验,共收集有效数据37个。结果表明：（1） 即刻条件下,高、低难度词对都出现了练习伴随低估效应;（2） 延迟条件下,高、低难度词对均未出现练习伴随低估效应。对低难度词对的学习判断准确预测了回忆成绩,高难度词对则出现了练习伴随高估效应;（3） 随着学习次数的增加,不同难度词对在即刻条件下的练习伴随低估效应趋于消失,延迟条件下高难度词对的练习伴随高估效应趋于消失。     

提取练习效应的产生机制:编码、提取的整合演变

提取练习效应指相比同等时间的重复学习,对所学材料进行提取练习(即使无反馈)可使被试在之后的回忆测验中表现更好。早期研究从编码或提取单维度地对提取练习效应进行了描述性解释,新近以来,研究者整合了编码和提取在提取练习效应中的作用,从记忆加工全过程的角度考察了提取练习效应的产生机制,并得到诸多研究证据的支持。论文梳理了提取练习效应产生机制的各类假说,并重点分析比较了精细提取假说和情景背景假说,指出后者在解释提取练习效应上的优势。未来研究可结合认知神经科学的研究技术为情景背景假说提供更直接的证据,有关提取练习对于短期和长期记忆促进效果的争议也有待进一步解释厘清,同时如何在揭示其原理的基础上将其更高效地加以应用亦有待实践探索。     

知觉运动学习中的背景干扰效应和元认知监测

选取大学生为被试,采用两因素混合实验设计,以预期按键反应作为知觉运动学习任务.在运动学习任务中,设置了集中练习和分散练习两种练习方式以及三个练习一测试组块.通过分析不同练习方式和练习-测试组块对练习成绩、测试成绩以及元认知监测的影响,考察运动知觉学习的背景干扰效应、练习伴随低估效应以及元认知监测的依据.结果发现: (1)缩短练习与测试之间的时间间隔,经典的背景干扰效应没有出现; (2)在知觉运动学习的多组块练习过程中.元认知监测准确性没有出现练习伴随低估效应; (3)集中练习组更多地以当前的练习成绩作为依据进行预测,从而导致了对预测的高估.     

上下文熟悉效应对元记忆监测和记忆的影响

在认知任务中,伴随编码和检索的外围信息被称为上下文,其本身并不是编码或检索的目标。如果学习时的上下文在其后进行提取时重复出现,不管是否对应之前的学习项目,都会增加个体再认正确的概率。这种由于上下文增强项目熟悉感而促进记忆效果的现象就称为上下文熟悉效应。本研究通过两个实验探究上下文熟悉效应对元记忆监测及记忆的影响机制。其中,元记忆监测是以学习判断和信心判断为指标。记忆成绩则是以再认正确率为指标。研究结果显示:第一,上下文熟悉效应影响元记忆监测:学习判断等级上,恢复条件显著高于新条件,且不受任务难度影响; 信心判断等级上,简单任务时恢复条件与新条件无显著差异,困难任务时恢复条件显著高于新条件。第二,上下文熟悉效应影响记忆成绩:再认成绩上,简单任务时新条件显著高于恢复条件; 困难任务时恢复条件显著高于新条件。研究得出结论:上下文熟悉效应对元记忆监测和记忆都有显著影响,任务难度起调节作用。     

反馈干预对学习判断的影响

将反馈干预作为外部线索引入元记忆研究,采用重复学习任务,在第一轮次学习-测验之后插入反馈干预,用两个实验分别考查任务反馈和能力反馈两种形式下的反馈效价对第二轮次即时学习判断的影响.结果表明：①在学习过程中,学习者会进行自我监测;②在任务反馈形式下,反馈信息与自我监测信息冲突,导致反馈干预对元认知监测和认知过程没有影响;③在能力反馈形式下,反馈信息与自我监测信息的冲突消失,结果消极反馈影响了元认知监测.由此得出结论：只有在不与自我监测信息冲突的情况下,反馈干预才对学习判断产生影响.此外,在有反馈干预的情况下,两个实验中都出现了显著的练习伴随低估效应.     

延迟学习判断的效应机制

研究考察了延迟学习判断的记忆假说和元记忆假说。实验一通过插入预测试的方法, 消除即时学习判断与延迟学习判断在记忆方面的差异, 结果发现, 延迟学习判断的准确性显著高于插入预测试的即时学习判断的准确性, 说明延迟学习判断的确提高了元记忆水平; 实验二采用PRAM实验程序, 对元记忆假说的机制进行探讨, 结果发现, 加入干扰任务的即时学习判断排除短时记忆的程度远远低于延迟学习判断干扰, 说明学习判断的准确性与短时记忆干扰的排除程度有关, 短时记忆干扰越强, 学习判断的准确性 越低。     

知觉线索对元记忆监控的影响

近年来, 越来越多的证据表明知觉线索影响个体的高级认知--元记忆。元记忆指个体对自己学习和记忆活动的认知, 其核心成分是监测和控制。研究发现, 多种知觉线索(如字体大小、音量、文本清晰度、重量、亮度等)影响个体的元记忆监测(如学习判断和自信心评定)及控制(如学习时间分配)。这种影响可能是加工流畅性所致, 也可能基于人们的信念产生。未来研究有必要进一步探究知觉线索影响元记忆监控的条件, 并厘清加工流畅性和信念的具体作用。     

学前儿童FOK判断及其产生机制的实验研究

FOK(Feeling—of—knowing)是元记忆监测性判断的一种重要形式,当前探讨的热点问题是FOK在记忆信息加工中的作用以及其背后的产生机制问题。关于其产生机制问题,目前已提出两种假说:即靶项目提取可能性假说和线索熟悉性假说。本实验的目的是揭露影响FOK判断的因素及FOK的产生机制。实验的另一个目的是探讨学前(大班)儿童被试是否有FOK判断的能力。实验被试是24名幼儿园大班的儿童,并使用了中文字词做学习材料,要求被试完成词对学习、FOK判断、迫选再认等一系列任务。实验结果表明:学前大班儿童有进行FOK判断的能力;本实验中影响FOK判断的因素主要是词对间有无意义联系,倾向于靶项目提取可能性假说。     

Does retrieval fluency contribute to the underconfidence-with-practice effect?

Judgments of learning (JOLs) made during multiple study-test trials underestimate increases in recall performance across those trials, an effect that has been dubbed the underconfidence-with-practice (UWP) effect. In 3 experiments, the authors examined the contribution of retrieval fluency to the UWP effect for immediate and delayed JOLs. The UWP effect was demonstrated with reliable underconfidence on Trial 2 occurring for both kinds of JOL. However, in contrast to a retrieval-fluency hypothesis, fine-grained analyses indicated that the reliance of JOLs on retrieval fluency contributed minimally to the UWP effect. Our discussion focuses on the status of the retrieval-fluency hypothesis for the UWP effect.     

Lack of pervasiveness of the underconfidence-with-practice effect: boundary conditions and an explanation via anchoring

The authors investigated whether underconfidence in judgments of learning (JOLs) is pervasive across multiple study-test trials as suggested by A. Koriat, L. Sheffer, and H. Ma'ayan (2002) or whether underconfidence with practice (UWP) might be a kind of anchoring-and-adjustment effect, such that the occurrence or nonoccurrence of the UWP effect depends on whether recall is above a psychological anchor. Participants studied normatively difficult items or normatively easy items and made immediate JOLs or delayed JOLs. The UWP effect occurred for easy items, but for difficult items an overconfidence-with-practice (OWP) effect occurred for delayed JOLs and no bias occurred for immediate JOLs. The systematic occurrence of all 3 outcomes establishes boundary conditions for the UWP effect and confirms the hypothesis that underconfidence (or the lack thereof) may arise at least in part from an anchoring-and-adjustment mechanism.     

Exploring a mnemonic debiasing account of the underconfidence-with-practice effect

Judgments of learning (JOLs) underestimate the increase in recall that occurs with repeated study (the underconfidence-with-practice effect; UWP). The authors explore an account in terms of a foresight bias in which JOLs are inflated when the to-be-recalled target highlights aspects of the cue that are not transparent when the cue appears alone and the tendency of practice to alleviate bias by providing learners with cues pertinent to recall. In 3 experiments the UWP effect was strongest for items that induce a foresight bias, but delaying JOLs reduced the debiasing effects of practice, thereby moderating the UWP effect. This occurred when delayed JOLs were prompted by the cue alone (like during testing), not when prompted by the cue-target pair (like during study).     

任务类线索对学习难易度判断及其准确性影响的实验研究

摘要：通过两个实验考察任务类线索（词频、关联性、学习次数）对学习难易度判断及其准确性的影响。结果表明：（1）词频和关联性对学习难易度判断均有显著影响,高频词对、有关联词对的预测成绩显著高于低频词对和无关联词对的预测成绩;（2）高频词对和低频词对的预测成绩均出现高估,但低频词对的估计更准确;有无关联词对相比,无关联词对预测成绩偏差更大,有关联词对的难易度判断更准确;（3）词频高低只影响成绩的预测,不影响实际回忆成绩;关联性既影响对成绩的预测,也影响实际回忆成绩。（4）学习次数对难易度判断没有显著影响,但随学习次数增加,判断准确性降低,出现低估现象。结论：材料因素对学习难易度判断等级具有较稳定的影响;不同材料因素（词频、关联性）对难易度判断准确性的影响方式不同;学习次数对学习难易度判断没有显著影响;学习难易度判断中存在练习伴随低估效应。     

The role of memory for past test in the underconfidence with practice effect

According to the Memory for Past Test (MPT) heuristic, judgments of learning (JOLs) may be based, in part, on memory for the correctness of answers on a previous test. The authors explored MPT as the source of the underconfidence with practice effect (UWP; A. Koriat, L. Sheffer, & H. Ma'ayan, 2002), whereby Trial 1 overconfidence switches to underconfidence by Trial 2. Immediate and delayed JOLs were contrasted because only immediate JOLs demonstrate UWP. Consistent with MPT for immediate JOLs, Trial 1 test performance better predicted Trial 2 JOLs than did Trial 2 test performance. Delayed JOLs showed the reverse. Furthermore, items forgotten on Trial 1 but remembered on Trial 2 contributed disproportionately to UWP, but only with immediate JOLs.     

Can the memory enhancement of the survival judgment task be explained by the elaboration hypothesis?: Evidence from a memory load paradigm1

Many reports have described a survival judgment task that requires participants to judge words according to their relevance to a survival situation, eliciting better recall than that obtained in other judgment tasks (e.g., semantic or self‐judgment tasks). Two explanatory hypotheses (the adaptive hypothesis and the elaboration hypothesis) have been proposed. Here we used the memory load paradigm to investigate whether the adaptive hypothesis or the combination hypothesis can better account for the memory enhancement of the survival judgment task. We used a survival judgment task and an autobiographical recall task with the condition of no memory load or memory load. The 48 participants performed four encoding conditions (memory load—survival, no memory load—survival, memory load—autobiographical, and no memory load—autobiographical). The results showed that memory enhancement of the survival judgment task occurred only in the no memory load condition, but not in the memory load condition. Our results support the elaboration hypothesis. We also discuss the validity of the elaboration hypothesis and future directions to be pursued in this research field.     

Intensity dependence of perceived duration: data, theories, and neural integration

Evaluates 2 theoretical models suggested to explain studies of the effect of stimulus intensity on the perceived duration of brief light flashes. Some studies found a direct relationship between the 2 variables; others found an indirect relationship. Each model suggests that an additional variable interacts with stimulus intensity. Proposed variables have included the nature of the judgment and the absolute intensity. The present evaluation indicates that both of the proposed variables play a role and that a melding of the models could best account for this phenomenon. The melding incorporates known time- and intensity-dependent characteristics of neural integration into the behavioral performance. The evaluation also indicates that future experiments on this problem will be most informative if they (a) give particular attention to the role of instructions, (b) explore an adequate range of intensities, and (c) strictly control adaptive state.     

情绪状态对学习判断的影响及其机制

两个实验用于研究情绪对学习判断的影响及其机制,结果表明：（1）首轮回忆测验成绩可以通过影响个体的情绪状态来影响后继的学习判断以及回忆测验和学习判断的绝对准确性。（2）情绪可以影响学习判断和个体对学习内容的加工深度,加工深度的提高有利于个体的回忆成绩,学习判断和回忆成绩共同影响着学习判断的准确性。