不同表面特征图片对内隐记忆和外显记忆的影响

该研究选取30名被试,采用任务分离实验研究范式探讨不同表面特征图片对内隐记忆和外显记忆的影响。以32张动物图片为实验材料,其中鱼类和鸟类图片各半。两类图片中一半为黑白图片,另一半为彩色图片,所有实验材料用E—Prime软件呈现在电脑上。结果表明：（1）不同表面特征图片的再认成绩（外显记忆）显著好于偏好再认成绩（内隐记忆）,即外显记忆成绩好于内隐记忆;（2）在再认测验和偏好判断测验中,再认成绩和偏好再认成绩在图片表面特征的两个水平上存在显著差异;（3）控制组的偏好再认成绩显著好于实验组的偏好再认成绩,即控制组的内隐记忆好于实验组。结论：刺激材料的表面特征既是外显记忆的内容,也是影响外显记忆的重要因素;内隐记忆的作业成绩高度依赖于刺激材料的表面特征,刺激材料的表面特征是影响两种记忆的重要因素。     

脑外伤患者记忆功能的双重特征：损伤与保存

该研究探讨了中─重型闭合性脑外伤患者及对照被试（各１７名）在对单个汉字不同水平的加工后,其外显记忆（自由回忆、再认）和内隐记忆（汉字补笔起动效应）的若干特点。发现：患者组外显记忆受损而内隐记忆正常;两组被试在深层意义加工中的外显记忆均强于在浅层表面加工中的外显记忆,这种语义易化现象以耗费更多的认知努力为代价,其中患者组耗费的尤多,而记忆效率却不及对照组。综上,脑外伤患者记忆功能呈损伤和保存双重性。     

精神分裂症患者的记忆损害

摘 要 目的 探讨精神分裂症患者记忆损害状况。方法 采用修正的加工分离记忆实验程序,分别测试精神分裂症患者和正常对照组的记忆能力。结果 （1）精神分裂症患者外显记忆功能存在广泛的缺陷,而内隐记忆功能缺陷只在概念驱动下的测验中出现。（2）以阳性症状为主的精神分裂症患者的外显记忆成绩均高于以阴性症状为主的精神分裂症患者。(3)阴性症状严重程度与外显记忆成绩呈显著负相关。结论 精神分裂症患者的内隐记忆功能相对完整,而外显记忆障碍在以阴性症状为主的精神分裂症患者尤为突出。     

心境一致性对大学生外显和内隐记忆影响的实验研究

以96名大一本科生为被试,采用120张情绪效价人物图片,运用加工分离范式研究心境一致性对大学生内隐记忆的影响。结果发现：（1）心境一致性效应不仅存在于外显记忆,而且也存在于内隐记忆;（2）心境一致性效应在外显记忆和内隐记忆上没有性别差异;（3）在心境一致性实验中,自然抑郁组被试可能存在外显记忆缺损。     

内隐和外显记忆的发展研究

采用Buchner等人（1995）提出的加工分离范式的修正模型,对内隐和外显记忆进行分离。结果表明：内隐记忆水平随年龄的变化不大．而外显记忆水平在12岁左右达到高峰;内隐记忆与外显记忆均不具有性别差异。     

Alzheimer病人记忆损害特征的研究

目的了解AD病人记忆损害的特征。方法采用多维记忆评估量表中的12个分测验对30例临床诊断可能的Alzheimer病患者及与病人组相匹配的30例正常受试进行记忆功能的测定。结果AD组几乎在所有的分测验和指数分上均差于对照组。AD轻度组仅在自由组词、残图命名、空间广度、常识记忆等4个分测验及记忆广度、内隐记忆等2个指数分上与对照组之间无明显差异。中重度组则在所有分测验和指数分均差于对照组。经以教育年限为协变量校正后,轻度与中重度组在自由组词、残图命名、经历定向、常识记忆、自由回忆、内隐记忆、日常记忆等分测验和指数分上存在明显差异。12个分测验成绩的比较发现,负荷外显记忆的各个分测验的成绩均较差,负荷内隐记忆的两个分测验的成绩较好。结论轻度AD病人存在着广泛的外显记忆障碍,中重度AD病人除了存在外显记忆障碍外还表现出内隐记忆和日常生括记忆的障碍。这一结果提示人类大脑中存在着多个记忆系统,不同系统受损所导致的记忆障碍不同。     

再认记忆测验中抑郁个体的心境一致性记忆研究

采用Ｊａｃｏｂｙ的加工分离程序,对再从记忆测验中外显记忆成分与内隐记忆成分的贡献进行分离,考察了抑郁个体的内隐记忆和外显记忆是否具有心境一致性记忆倾向。结果表明：抑郁个体的外显记忆具有心境一致性倾向,而内隐记忆不存在心境一致性倾向,表明心境一致性记忆需要精细加工机制的参与。另外发现,抑郁个体存在外显记忆缺损而没有出现内隐记忆缺损。最后就一些有待进一步研究的方面进行了讨论。     

外显、内隐记忆与场依存-场独立认知风格关系的实验研究

外显记忆是指当个体需要有意识或主动收集某些经验用以完成当前任务时所表现出的记忆。内隐记忆是指在不需要意识或有意回忆的情况下,个体的经验自动对当前任务产生影响而表现出来的记忆。外显记忆与内隐记忆是存在着质的差异的两种的记忆,这种区别在个体差异方面亦得到体现。Roediger,H．L．通过对脑损伤、脑老化、脑不成熟以及酒精中毒患者的外显记忆、内隐记忆与正常对照组的比较研究发现,     

知觉和概念加工范式对内隐与外显记忆发展的影响

控制知觉材料的熟悉性和概念范例的典型性,以考察它们对内隐与外显记忆发展的影响。结果表明：（1）知觉内隐记忆的启动效应不存在年龄和熟悉性效应,而知觉外显记忆成绩则具有明显的年龄和熟悉性效应;（2）在概念内隐记忆任务上,典型范例的启动效应不存在年龄差异,非典型范例的启动效应则存在随年龄而增长的启动效应：无论是典型范例还是非典型范例的外显记忆成绩均随年龄增长而提高。     

额叶参与对新异联系的启动效应——来自脑损伤病人的证据

对新异联系的启动效应是内隐记忆的一种形式,又称联想启动。采用知觉辨认任务,探讨额叶损伤与联想启动的关系。25例额叶损伤病人及18例匹配的正常被试参与实验。结果表明,额叶受损病人辨认旧词对与重组词对的正确率没有明显差别;而且,轻度记忆损伤的额叶病人再认成绩正常,但联想启动值低于对照组,内隐记忆和外显数、坚持性反应数和语词流畅性等有中度相关。这些结果提示,额叶不仅与情节记忆、工作记忆等外显记忆有关,也参与了以非相关词对为材料的联想启动。     

Implicit memory and depression: preserved conceptual priming in subclinical depression

Depression impairs explicit memory but research on implicit memory is equivocal. Initial studies indicated preserved implicit memory, implying a depressive deficit in intentional but not unintentional forms of memory. Subsequent research indicated that conceptual priming is reduced in depression, implying a deficit in conceptual memory processes be they implicit or explicit. However, the findings with conceptual priming may be compromised by explicit contamination. The present study compared subclinically depressed and non-depressed participants on matched conceptual tests of explicit memory (category-cued recall) and implicit memory (category production). The implicit test was followed by a post-test questionnaire used to categorise participants as test-aware or test-unaware. On the explicit test, the subclinically depressed participants recalled less than the non-depressed participants. The results on the implicit test depended on test-awareness. Among test-unaware participants, conceptual priming was equivalent across the two groups, whereas for the test-aware, non-depressed participants produced significantly more priming than the subclinically depressed. This indicates that when explicit contamination is controlled, depression does not impair conceptual priming. The depressive dissociation between implicit and explicit memory is better accounted for by the difference between intentional and unintentional forms of memory rather than by the difference between conceptual and perceptual memory processes.     

IMPLICIT MEMORY IN AMNESIC PATIENTS:

Abstract— Previous observations of spared priming in amnesic patients have been based almost entirely on data from visual implicit memory tests Our research examined perceptual priming.in amnesic patients and control subjects on an auditory identification task in which previously spoken words and new words were presented in white noise We manipulated type of encoding task (semantic vs nonsemantic) and speaker's voice at study and test (same vs different) Priming was little affected.by either manipulation, and amnesic patients exhibited normal priming in all experimental conditions On an explicit test of recognition memory, by contrast, amnesic patients exhibited.severely impaired performance following the semantic study task, all subjects showed poor explicit memory following the nonsemantic study task Results are consistent with the idea that auditory priming depends largely on a presemantic auditory perceptual representation system     

Interidentity memory transfer in dissociative identity disorder

Controversy surrounding dissociative identity disorder (DID) has focused on conflicting findings regarding the validity and nature of interidentity amnesia, illustrating the need for objective methods of examining amnesia that can discriminate between explicit and implicit memory transfer. In the present study, the authors used a cross-modal manipulation designed to mitigate implicit memory effects. Explicit memory transfer between identities was examined in 7 DID participants and 34 matched control participants. After words were presented to one identity auditorily, the authors tested another identity for memory of those words in the visual modality using an exclusion paradigm. Despite self-reported interidentity amnesia, memory for experimental stimuli transferred between identities. DID patients showed no superior ability to compartmentalize information, as would be expected with interidentity amnesia. The cross-modal nature of the test makes it unlikely that memory transfer was implicit. These findings demonstrate that subjective reports of interidentity amnesia are not necessarily corroborated by objective tests of explicit memory transfer.     

Memory deficits in Alzheimer's patients: A comprehensive review

Despite considerable experimental work on Alzheimer's disease (AD), the underlying cognitive mechanisms as well as the precise localization of neuropathological changes critical for memory loss remains undefined. A review of the neuropsychological literature on long-term memory deficits in AD patients suggests that AD patients display (a) a pervasive deficit of explicit memory, (b) a partial deficiency of implicit memory for verbal and visuoperceptual material (as measured by repetition priming procedures), and (c) a substantial sparing of implicit memory for visuomotor skills. The explicit memory loss is likely a result of encoding as well as consolidation difficulties. A faulty lexical-semantic knowledge structure appears responsible for deficient repetition priming effects. Since neuropathological changes diffusely affect the brain of AD patients, establishing a clear relationship between localization of cerebral lesions and memory deficits is particularly difficult. Nevertheless, data suggest that extensive involvement of the hippocampal-amygdala complex plays a major role in explicit memory loss. Damage to associative cortical areas likely is involved in repetition priming deficits. The relative integrity of primary motor and sensory cortical areas and of the basal ganglia likely subsume, by contrast, the normal learning of visuomotor skills.     

Low Reliability of Perceptual Priming: Consequences for the Interpretation of Functional Dissociations Between Explicit and Implicit Memory

In this study, three experiments are presented that investigate the reliability of memory measures. In Experiment 1, the well-known dissociation between explicit (recall, recognition) and implicit memory (picture clarification) as a function of age in a sample of 335 persons aged between 65 and 95 was replicated. Test-retest reliability was significantly lower in implicit than in explicit measures. In Experiment 2, parallel-test reliabilities in a student sample confirmed the finding of Experiment 1. In Experiment 3, the reliability of cued recall and word stem completion was investigated. There were significant priming effects and a dissociation between explicit and implicit memory as a function of levels of processing. However, the reliability of implicit memory measures was again substantially lower than in explicit tests in all test conditions. As a consequence, differential reliabilities of direct and indirect memory tests should be considered as a possible determinant of dissociations between explicit and implicit memory as a function of experimental or quasi-experimental manipulations.     

认知疲劳效应对内隐记忆与外显记忆的影响

本研究通过比较内隐记忆与外显记忆受到认知疲劳影响的情况,以了解内隐记忆的自动化加工机制。实验采用被试内设计,使用词汇判断与词汇再认任务测量内隐记忆与外显记忆。实验结果发现,相对于控制组,疲劳组的被试在完成疲劳任务后内隐记忆成绩显著下降,而外显记忆没有受到影响。结果说明相对于外显记忆,内隐记忆更容易受到认知疲劳影响。内隐记忆虽然是无意识的认知加工,但是与其他自动化加工具有不同的特征。     

工作记忆容量对显、隐性反馈的调节机制研究

本研究选择汉语量词为目标语结构,考察工作记忆容量对显、隐性两类反馈不同的调节机制。105名来自加拿大多伦多地区母语为英语的中学生被随机分为显性修正组、隐性重铸组和控制组,工作记忆容量采用听力跨度测试测量,显、隐性反馈的效果通过语法判断测试与引导性模仿测试分别进行评估。研究结果表明:(1)工作记忆容量有效调节了显性反馈,但对隐性反馈的调节作用不明显;(2)受试的工作记忆容量越高,对显性反馈的调节作用就越明显。     

认知疲劳效应对内隐记忆与外显记忆的影响

本研究通过比较内隐记忆与外显记忆受到认知疲劳影响的情况,以了解内隐记忆的自动化加工机制。实验采用被试内设计,使用词汇判断与词汇再认任务测量内隐记忆与外显记忆。实验结果发现,相对于控制组,疲劳组的被试在完成疲劳任务后内隐记忆成绩显著下降,而外显记忆没有受到影响。结果说明相对于外显记忆,内隐记忆更容易受到认知疲劳影响。内隐记忆虽然是无意识的认知加工,但是与其他自动化加工具有不同的特征。     

Implicit and explicit memory for visual patterns

The article reports an investigation of implicit and explicit memory for novel, visual patterns. Implicit memory was assessed by a speeded perception task, and explicit memory by a four-alternative, forced-choice recognition task. Tests were given either immediately after testing or 7 days later. The results suggest that a single exposure of a novel, nonverbal stimulus is sufficient to establish a representation in memory that is capable of supporting long-lived perceptual priming. In contrast, recognition memory showed significant loss over the same delay. Performance measures in the two tasks showed stochastic independence on the first trial after a single exposure to each pattern. Finally, a specific occurrence of a previously studied item could be retrieved from explicit memory but did not affect the accuracy of perception in the implicit memory test. The results extend the domain of experimental dissociations between explicit and implicit memory to include novel, nonverbal stimuli.     

Levels-of-processing effects on Chinese character completion: The importance of lexical processing and test cue

The levels of processing (LoP) effect was studied in Chinese character completion tasks. The same stem cue, either graphemically or semantically related to the target character, was used to generate either a perceptual or a conceptual test. Participants received either direct or indirect instructions, so that the same stem cue also produced either an explicit or an implicit test of memory. This allowed us to examine simultaneously the roles of perceptual versus conceptual test and retrieval intentionality in the LoP effect. No LoP effects were found when the memory test was implicit. LoP effects were also not found for stems and characters related graphemically (perceptually), but were found for stems and characters related semantically (conceptually) when the memory test was explicit. The results are discussed in terms of the importance of lexical processing for character completion tests and the importance of reinstatement of the study process during retrieval for explicit memory tests.