内隐和外显记忆测验的信度比较研究及思考

任务分离的实验范式以功能分离和随机独立性等证据说明不同记忆任务的底层系统或加工机制。近期研究发现,两种记忆测量重测信度、复本信度和分半信度差异显著,内隐测验的信度更低一些,因而对变量效果缺乏足够的敏感性。两种测验信度差异对任务分离提出了区别于系统说或加工观点的另外解释。以后在研究外显和内隐记忆分离的时候应该慎重考虑测验信度的检验问题,还应通过各种方法来提高内隐记忆测验的信度,使两种记忆测验的信度具有可比性。     

人工语法学习中习得知识的分离:基于信号检测论和结构知识的视角

习得知识的意识觉知问题一直以来是内隐学习领域的研究热点和难点。以加工分离程序来分解击中率和虚报率、以结构知识中意识和无意识测量为视角,采用2（测验方式：SDTT,SKT）×2（学习程度：30试次,60试次）混合设计,试图去分离人工语法学习中习得的意识知识和无意识知识。结果发现：（1）学习程度影响到习得的无意识知识,但还未影响到习得的意识知识;（2）在分离人工语法学习的习得知识上,SDTT的敏感性高于SKT;（3）SKT夸大了元认知中的意识成分。     

再认记忆中的概率学习效应:加工分离框架

采用加工分离程序(PDP)与多项加工树模型,对比检验PDP与背景鉴别模型的构思效度;操纵加工水平与项目比例,考察再认记忆中的内隐学习效应。结果表明:(1)包含和排除测验都表现出加工水平效应,包含测验具有视听通道效应。(2)在单一操作中分离出意识回忆和自动加工两种过程。(3)在语义编码条件下出现了概率学习效应,自动加工可能具有情境依存性。未发现支持背景鉴别模型的结果。     

提取任务对联合效应和特征效应的调节不具有测验范式敏感性

我们近期发表的研究显示,联合效应和特征效应具有提取任务敏感性,表现为来源提取较项目再认任务的相应效应更强。然而,来源提取任务中仅采用了排除范式,其他测验范式的相应效应尚未报告。因此本实验在此基础上更改了测验范式,采用三键范式。结果显示,来源提取任务中的联合效应和特征效应仍然比再认任务中的相应效应强,表明联合效应和特征效应的提取任务敏感性不为测验范式所调节,提取任务对两类效应的调节与双重加工模型相吻合。     

广告的加工时间和注意水平对消费者信息加工模式的影响

本研究通过直接测量、间接测量和加工分离程序这几种测量方法检验了消费者对广告品牌名称的外显记忆和内隐记忆,并考察了各种测量方法对注意水平和信息加工时间的敏感性。结果发现：(1)分散注意条件下,再认成绩降低,而名牌判断任务的成绩没有差异;控制性加工减少,而自动化加工在各种注意水平下变化不大;(2)广告刺激呈现时间的减少降低了控制性的加工;(3)PDP可以分离广告的控制性加工和自动化加工。     

汉字的无线索回忆再认效应:重复学习和重复测验的作用

采用无线索回忆再认范式,对基于熟悉性的汉字语义特征再认进行了探索,考察了重复学习和重复测验对汉字语义特征的无线索回忆再认效应(RWCR效应)的影响。实验1采用即时测验,实验2采用延时测验,结果发现:(1)无论即时还是延时测验,汉字语义特征的再认均存在RWCR效应。(2)在即时测验时,重复学习对熟悉性有显著影响,重复测验对熟悉性没有影响;重复学习和重复测验均提高回想成绩,但二者无差异。(3)在延时测验时,重复学习组和重复测验组的熟悉性评分均下降,但前者下降快于后者;重复测验组回想的遗忘率较低,重复学习组回想的遗忘率较高。上述结果说明,汉字的语义特征存在稳定的RWCR效应,且重复学习主要影响熟悉性,重复测验主要影响回想。进一步证明了再认记忆的双加工理论。     

内隐社会认知的初步实验研究

使用攻击和被攻击者相互作用的实验图片,随机抽取大学本科生９０名,采用３种加工类型×２种测验方式的混合设计来考察社会认知的无意识或内隐成分。结果表明：１．加工类型对被试的再认测验和偏好测验有不同的影响,即出现了实验性分离;２．内隐态度是可以测量的,且明显影响被试的社会判断     

多项式加工树模型在再认启发式中的应用

摘 要 再认启发式利用再认线索进行决策。以往研究采用一致率、击中率、虚报率和区分指数来表示再认启发式使用,然而这些方法都存在局限。多项式加工树模型能够分离不同的认知加工过程,为了解决再认使用与知识使用的混淆,研究者提出一种多项式加工树模型 r-model 测量再认启发式的使用。本文将重 点介绍 r-model,具体包括 r-model 的内容、数据分析以及考虑个体差异的分层 r-model。最后,从 r-model 的模型修正和边界条件两个方面提出未来研究方向。 关键词 再认启发式;流畅启发式;多项式加工树;贝叶斯分层模型     

PDP再认型实验程序与刺激来源的可鉴别性研究

提出应根据实验程序的不同,把加工分离模型（ＰＤＰ）进一步分为启动型和再认型两类。２个实验考察了刺激来源的可 鉴别性在ＰＤＰ的再认型实验程序中的作用,同时还考察了注意水平、刺激材料和加工水平等因素对词单１刺激项目再认成绩的影 响。结果发现：熟悉感和刺激来源的可鉴别性共同决定了被试在排除测验中的反应;汉字作刺激材料并不影响实验结果。     

关于再认双加工机制的实验--反应速度的影响研究

采用加工分离的范式,通过对反应速度的操作,发现再认的两个成份意识性提取和自动提取成绩之间出现了实验性分离.测验阶段反应速度的要求不同对自动提取成绩的影响很小,但是显著地影响了意识性提取的成绩.本实验的结果为再认的双加工机制提供了证据.     

The neural correlates of implicit and explicit sequence learning: Interacting networks revealed by the process dissociation procedure

In two H2(15)O PET scan experiments, we investigated the cerebral correlates of explicit and implicit knowledge in a serial reaction time (SRT) task. To do so, we used a novel application of the Process Dissociation Procedure, a behavioral paradigm that makes it possible to separately assess conscious and unconscious contributions to performance during a subsequent sequence generation task. To manipulate the extent to which the repeating sequential pattern was learned explicitly, we varied the pace of the choice reaction time task-a variable that is known to have differential effects on the extent to which sensitivity to sequence structure involves implicit or explicit knowledge. Results showed that activity in the striatum subtends the implicit component of performance during recollection of a learned sequence, whereas the anterior cingulate/mesial prefrontal cortex (ACC/MPFC) supports the explicit component. Most importantly, we found that the ACC/MPFC exerts control on the activity of the striatum during retrieval of the sequence after explicit learning, whereas the activity of these regions is uncoupled when learning had been essentially implicit. These data suggest that implicit learning processes can be successfully controlled by conscious knowledge when learning is essentially explicit. They also supply further evidence for a partial dissociation between the neural substrates supporting conscious and nonconscious components of performance during recollection of a learned sequence.     

人工语法学习中意识加工的渐进发展

内隐学习研究致力于探讨学习活动的意识加工程度, 当前相关的研究逻辑从传统的意识二分观转向渐进意识假设。本研究通过对人工语法范式进行改造, 并借鉴加工分离程序的有关思想, 在学习阶段引入双重测量任务, 并根据双重任务成绩计算分离出相应学习时段的意识与无意识成分的贡献分数, 从而考察在内隐学习过程中两种加工成分的动态变化特征。研究结果支持渐进意识假设, 在学习进程中, 无意识成分和意识成分都呈现出渐进发展的趋势; 而随学习的深入, 两种成分呈现出不同的变化模式, 中后期意识加工快速增长, 无意识加工则保持平缓发展, 渐进意识系统整体呈现向外显学习推进的发展态势。     

Implicit sequence learning and conscious awareness

This paper uses the Process Dissociation Procedure to explore whether people can acquire unconscious knowledge in the serial reaction time task [Destrebecqz, A., & Cleeremans, A. (2001). Can sequence learning be implicit? New evidence with the Process Dissociation Procedure. Psychonomic Bulletin &Review, 8, 343-350; Wilkinson, L., & Shanks, D. R. (2004). Intentional control and implicit sequence learning. Journal of Experimental Psychology: Learning, Memory, and Cognition, 30, 354-369]. Experiment 1 showed that people generated legal sequences above baseline levels under exclusion instructions. Reward moved exclusion performance towards baseline, indicating that the extent of motivation in the test phase influenced the expression of unconscious knowledge. Experiments 2 and 3 revealed that even with reward, adding noise to the sequences or shortening training led to above-baseline exclusion performance, suggesting that task difficulty and the amount of training also affected the expression of unconscious knowledge. The results help resolve some current debates about the role of conscious awareness in sequence learning.     

Issue-Event Extensions and Interaction Involvement Text-Based and Meaning-Based Discourse Strategies

Prior research focusing on textual features in the talk of high and low-involved speakers has characterized the discourse strategy of low-involved speakers as text-based and that of high-involved speakers as meaning-based. This study examined the extensions of issue-event structures by high-involved and low-involved participants to determine if this characterization of discourse strategies held on a pragmatic level as well. Results indicated that low-involved communicators extended the event significantly more directly than high-involved communicators. Furthermore, the issue extensions of low-involved communicators were shown to be more sensitive to the comprehensibitity and information value of the stimulus utterance than the issue extensions of high-involved communicators. The results confirm that low-involved communicators have more difficulty than high-involved communicators in responding to the flow of conversation and that low-involved communicators compensate by relying on a text-based discourse strategy.     

高低情感开放性者概率内隐序列学习进程差异

大五人格情感开放性子量表(openness/feeling)能否预测内隐序列学习的问题存在争议。本研究采用概率性内隐序列学习范式, 比较高低情感开放性者在各反应刺激间隔(response stimulus interval, 即RSI)的差异。发现：(1) RSI = 0 ms和250 ms, 高分组在转移组块后习得高概率序列, RSI = 500 ms及以上在其之前习得; 所有RSI点低分组都在其之前习得。每个RSI点只有高分组习得低概率序列。证明随RSI增加两者内隐进程有本质差异, openness/feeling子量表可预测内隐序列学习个体差异。(2)低概率序列可作为测量概率性内隐序列学习及个体差异的新指标, 经典转移组块、再认、生成任务的测量效果却十分有限。     

国内近十年来意识和无意识关系研究的新成就

近十年来,国内掀起了从自然科学途径进行意识和无意识对比研究的新热潮,尤其在实验范式的引进、修正、完善和模型建构方面,做出了中国学者自己的贡献。错误记忆、内隐时间及不注意视盲等新领域的触及代表了国内学者在意识研究内容上的丰富。“钢筋水泥”、“意识涌现”及“车站监视室”等模型的提出,代表了中国学者在意识研究理论方面的创新。当前国内意识研究与国外基本同步,但存在着“研究领域泛化,神经机制探讨有限,跨学科整合力度有待深化”的问题。     

Can unconscious knowledge allow control in sequence learning?

This paper investigates the conscious status of both the knowledge that an item is legal (judgment knowledge) and the knowledge of why it is legal (structural knowledge) in sequence learning. We compared ability to control use of knowledge (Process Dissociation Procedure) with stated awareness of the knowledge (subjective measures) as measures of the conscious status of knowledge. Experiment 1 showed that when people could control use of judgment knowledge they were indeed conscious of having that knowledge according to their own statements. Yet Experiment 2 showed that people could exert such control over the use of judgment knowledge when claiming they had no structural knowledge: i.e. conscious judgment knowledge could be based on unconscious structural knowledge. Further implicit learning research should be clear over whether judgment or structural knowledge is claimed to be unconscious as the two dissociate in sequence learning.     

How sequence learning creates explicit knowledge: the role of response–stimulus interval

Destrebecqz and Cleeremans (Psychon bull rev 8:343-350, 2001; Attention and implicit learning. John Benjamins Publishing Company, Amsterdam, pp 181-213, 2003) reported that increasing the response-stimulus interval (RSI) during incidental sequence learning improved participants' ability to discriminate old and new sequences in a recognition test. However, the original experimental design confounded RSI effects during training and test. I therefore repeated the experiment with an improved design in which RSI was varied systematically during the training phase and the recognition task. Participants learned a sequence of response locations either incidentally or intentionally. As a result, sequence recognition was not affected by the RSI manipulations in the group of incidental learners. With intentional learning instructions, recognition was unaffected by training RSI, but a long RSI in the test phase improved recognition performance over a short RSI. Response latencies while executing the test sequences indicated no effect of training RSI on sequence learning. However, sequence knowledge was expressed more readily when the RSI in the test phase matched the RSI in the training phase.     

Attentional load and implicit sequence learning

A widely employed conceptualization of implicit learning hypothesizes that it makes minimal demands on attentional resources. This conjecture was investigated by comparing learning under single-task and dual-task conditions in the sequential reaction time (SRT) task. Participants learned probabilistic sequences, with dual-task participants additionally having to perform a counting task using stimuli that were targets in the SRT display. Both groups were then tested for sequence knowledge under single-task (Experiments 1 and 2) or dual-task (Experiment 3) conditions. Participants also completed a free generation task (Experiments 2 and 3) under inclusion or exclusion conditions to determine if sequence knowledge was conscious or unconscious in terms of its access to intentional control. The experiments revealed that the secondary task impaired sequence learning and that sequence knowledge was consciously accessible. These findings disconfirm both the notion that implicit learning is able to proceed normally under conditions of divided attention, and that the acquired knowledge is inaccessible to consciousness. A unitary framework for conceptualizing implicit and explicit learning is proposed.