社会认知中印象形成的启动效应研究:频因,近因效应

本文以社会认知为出发点,考察印象形成的启动效应,它采用性质不同的成语作为实验材料,并操纵启动刺激的结构,系统探讨了印象形成的启动效应中原因与近因效应,结果发现：当呈现表示同一品质但性质相反的成语时,如果启动刺激和目标刺激之间不延迟,则近因在启动效应中起作用,但在延迟情况下,频因在启动效应中占优势;同时随着延迟的出现,启动效应明显变小。实验结果支持启动效应的突触模式说;     

词频、易接近性和词表序列成分对近因效应影响的实验研究

本研究目的探讨词频、易接近性和词表序列成分对近因效应的影响及其原因。两个实验以不同词频和不同易接近性的中文词为材料,运用直接自由回忆程序和操纵词表的组成成分,探讨近因效应的特点。实验结果表明：词频对近因效应的作用受词表序列成分的影响,对于纯的词表,高频词回忆的比例比低频词更高,对于混合词表,低频词回忆的比例比高频词更高,但是词的易接近性不影响近因效应且不受词表序列成分影响。文章最后对近因效应的性质进行了讨论。     

系列包含的项目数、项目之间的间隔时间与系列位置效应

以中国汉字为材料,考察系列包含的项目数、项目之间的时间间隔与系列位置曲线不同部分记忆性质分化的关系。结果表明,(1)提取过程的重要性。(2)在包含11个项目、并且项目之间的时间间隔为400毫秒的系列中,系列位置曲线的首因部分表现为联想记忆的性质,是依赖于线索的提取;近因部分表现为绝对记忆的性质,是依赖于记忆痕迹的提取。(3)系列位置曲线不同部分记忆性质的分化,于系列包含的项目数和项目之间的间隔时间有关,结果体现出这两个因素的交互作用。     

项目等距呈现过程中的系列位置效应

以中国汉字为材料,利用刘英茂提出的向前和向后联想的方法,证明在不同呈现时间和不同间隔时间条件下,系列位置曲线中首因效应和近因效应性质的分化过程。结果说明,系列位置曲线的近因部分对时间变化更为敏感,表现为绝对记忆的性质。系列位置曲线中首因效应和近因效应性质的分化,取决于项目呈现时间、项目间隔时间和系列包含的项目数。     

高低创造性思维水平者定向遗忘效应的差异研究

采用单字法定向遗忘范式,考察远距离联想任务得分高低者在中性和负性词语定向遗忘效应上的差异,来探讨创造性思维水平高低与主动抑制的关系。实验采用2(高/低创造性思维水平)×2(中性/负性词汇)×2(记住/忘记指令)×2(2s/5s时间间隔)混合设计,发现高低创造力组,在材料不同呈现时间下,对不同情绪材料的定向遗忘效应分别不同。低创者在2s和5s以及高创者在5s时间间隔时,均对中性词语表现出定向遗忘效应,而对负性词汇没有表现出明显的定性遗忘效应。高创者在2s时间间隔下,对中性和负性词语均表现出定向遗忘效应。结果表明较短时间内高创者对负性情绪的主动抑制能力优于低创者。     

不同熟练度双语者非语言任务转换的差异——来自ERP证据

考察熟练蒙汉双语者和非熟练汉英双语者在非语言任务转换中优势效应的脑电活动特征。采用线索任务2:1转换范式,通过操纵线索到刺激间的时间间隔,比较熟练双语者与非熟练双语者在不同时间间隔的转换代价减小效应,探索转换能力的优势效应是否源于内源性准备。研究结果显示:熟练双语者在线索到刺激间的时间间隔为250 ms时反应时和转换代价都显著小于非熟练双语者;熟练双语者在线索到刺激间的时间间隔从0 ms到250 ms的转换代价减小效应更大。脑电数据结果显示:无论转换序列还是重复序列,非熟练双语者的D-Pos的平均波幅均比熟练双语者更正,说明非熟练双语者需要更多的心理资源进行重构准备。研究提示不同语言的转换经验促进了熟练双语者执行功能的转换能力,这种转换能力的优势效应可迁移到相似的非语言任务转换过程中。     

时间间隔和情绪效价对双字词重复启动效应的影响

已有研究大多以中性刺激为材料,尚缺乏同时关注预存知识表征和情绪效价对重复启动效应影响及时间间隔对情绪材料相应效应调节机制的探究。本研究以国际情绪词库翻译而成的汉语双字词为材料并控制其效价,旨在探讨时间间隔对不同情绪效价词的重复启动效应的影响,并与转置词的结果相比较。结果显示,转置词较标准词的重复启动效应更强;立即重复较长间隔条件的重复启动效应更强;情绪效价与时间间隔交互影响词的重复启动效应。上述结果表明,情绪效价对重复启动效应的影响受时间间隔调节且支持注意资源缩减理论;该作用为材料是否具有预存知识表征所调节,支持自下而上加工的观点。     

提取过程越久记忆保持越好吗？材料难度的调节作用

提取练习效应揭示了提取对记忆保持的关键意义;学习时间分配的有关研究表明提取练习效应的大小可能与材料难度有关。两个实验探讨了提取时间与材料难度对提取练习效应的影响：实验1采用2（提取时间：短,长）×2（材料难度：容易,困难）的混合设计,5分钟后测查记忆保持水平。实验2采用类似设计,将最终测试间隔延长至24小时。结果发现,⑴ 延长提取时间均提高了记忆成绩和记忆保持率。⑵ 即时测试条件下,提取时间较短时,不同难度材料的记忆成绩差异不显著;提取时间较长时,困难材料的记忆成绩高于容易材料;困难材料的记忆保持率在不同提取时间下均高于容易材料。⑶ 延迟测试条件下,无论提取时间长短,困难材料的记忆成绩及保持率均高于容易材料。研究表明,延长提取时间对提取练习效应的影响受材料难度的调节;情境背景和必要难度是解释该调节作用的可能理论框架。     

非常短暂呈现时间过程中的系列位置效应

以中国汉字为材料,考察不同系列项目呈现时间范式中的系列位置效应,并验证Ｎｅａｔｈ提出的区辨理论公式对中文材料的适用性。结果表明,在非常短暂的系列项目呈现时间,并且项目之间的时间间隔按不同中数比率变化的实验条件中．均存在明显的系列位置效应;但是Ｎｅａｔｈ提出的区辨理论的公式,不能预测本实验结果,从另一个方面说明汉字不同于拼音文字的特点。     

记叙文阅读中人物第一印象的即时更新

采用移动窗口技术探讨读者在记叙文阅读中是否对人物第一印象进行即时更新。实验1探讨读者在阅读过程中是否会根据第一印象建构人物特征情境模型。实验2探讨已经形成的人物特征情境模型是否会受最近印象的影响得以更新。实验3探讨在明确描述人物特征的情况下,读者是否仍然会更新人物特征情境模型。研究结果表明,记叙文阅读中,读者会对人物第一印象进行即时更新,表现出首因效应向近因效应的转化。     

Memory for instances and categories in children and adults

College subjects and 7-year-olds were trained in sorting 16 words into two conceptual categories. Training consisted of either three list presentations (Experiment I) or training to solution (Experiment II). Then either immediately or after a 3 to 4 week delay subjects received a recognition test which assessed memory for the instance vs categorical properties of the task stimuli by embedding words from the original list and from the list categories with confusion items from either the same or different categories as those on the original list. The data indicated that learning and memory were controlled primarily by categorical properties of the task items in adults and by specific instance properties in children. However, there was evidence that children had learned the categorical attributes of the task and may have differed from adults chiefly in their failure to utilize these attributes to assist learning and memory performance. The age differences in learning and memory were independent of the degree of initial training.     

任务难度与部分线索效应

部分线索效应是指在学习一个词表后,呈现已学项目中的一部分作为回忆线索去回忆其他项目时,回忆效果反而不如没有线索组的效果好。研究通过三个实验探讨了不同任务难度的部分线索效应。结果表明：（1）在中文词表记忆中存在部分线索效应;（2）随着学习材料难度的提高由部分线索造成的提取成绩的削减量降低。这一研究结果支持了部分线索效应的策略破坏假说。     

Short-Term Visual Recognition Memory in Pigeons

Recognition memory for lists of items was investigated in pigeons using a YES-NO recognition technique. Experiment I showed that increasing the exposure duration of the first item of a two-item list improved recognition for that item without impairing recognition of the second item. Experiment II showed that decreasing the inter-trial interval had no effect on correct YES responses but significantly increased the number of false YES responses. Experiment III showed that recognition for the last two items of a three-item list was no poorer than that for lists of only two items. Experiment IV showed that increasing the delay between presentation and test of a two-item list (from 0·25-1 s) had a more disruptive effect on recognition for the second than for the first item. The data from these four experiments support a model proposed by Roberts and Grant, according to which memory traces are independent, and decay as a negatively accelerated function of time. Experiments V, VI, and VII investigated recognition for lists of three, four, and five items, and found no evidence for a primacy effect, performance being a linear function of time since sample offset.     

Serial position effects in visual short-term memory for words and abstract spatial patterns

Two experiments tested the effects of list postion, and retention-interval in recognition for two distinct stimulus categories in young adults. Stimulus categories were spatial abstract patterns and words presented on a computer screen. At short delay intervals recency effects predominates and at longer delay intervals a primacy effect predominates in both experiments, indicating similar basic memory processes producing the serial position functions for the two different categories of visual stimuli, but as length of retention-interval increases, memory for first list items improves for words and remains constant for abstract patterns. Recency functions are similar for both stimulus categories tested.     

Short-term memory in autism spectrum disorder

Three experiments examined verbal short-term memory in comparison and autism spectrum disorder (ASD) participants. Experiment 1 involved forward and backward digit recall. Experiment 2 used a standard immediate serial recall task where, contrary to the digit-span task, items (words) were not repeated from list to list. Hence, this task called more heavily on item memory. Experiment 3 tested short-term order memory with an order recognition test: Each word list was repeated with or without the position of 2 adjacent items swapped. The ASD group showed poorer performance in all 3 experiments. Experiments 1 and 2 showed that group differences were due to memory for the order of the items, not to memory for the items themselves. Confirming these findings, the results of Experiment 3 showed that the ASD group had more difficulty detecting a change in the temporal sequence of the items.     

Serial position phenomena: Memory for acts, contents and spatial position patterns

The influence of functional control operations on serial position effects was examined in a series of four experiments. When recall was required of performed operations as well as of the information operated upon, the result generally turned out to be absence of recency effects and presence of primacy effects. Primacy effects were found to be more prominent with active execution of operations than with passive list reception. Simultaneous presence of spatial and temporal position cues was shown to coincide with disruption of the ordinary primacy-recency pattern. The findings were taken to prove the importance of functional factors, and were interpreted as in agreement with a two-stage analysis of serial learning where the first stage is assumed to involve the differentiation of list items and the second stage the integration of differentiated items. The experiments were claimed to indicate that memory is better understood from a problem-solving than from an information-processing point of view.     

工作记忆中汉语反词长效应机制

工作记忆中的反词长效应(reverse word-length effect)指在对长词和短词混合的词表进行即时序列回忆时, 独立长词回忆成绩优于独立短词的现象。以汉字词语为材料通过3个实验探讨反词长效应的机制。实验1采用纯粹词表和长短词混合词表, 既得到纯粹词词长效应, 也得到独立词反词长效应。实验2削弱了长短词之间的词长差异, 结果独立词反词长效应消失, 且独立词回忆成绩优于纯粹词。实验3设计了视觉延迟条件, 得到与实验1类似的结果, 只是独立词反词长效应有所削弱。三个实验的结果并不一致, 无法用现有的语音回路理论或SIMPLE理论进行很好地解释, 理论的整合与创新显得非常重要。因此, 提出多重编码以既相互竞争又相互补充方式进行平行加工的观点进行更完整地解释。     

A comparison of item and source forgetting

The purpose of the present research was to compare memory for an item with memory for the item’s source. Experiment 1 investigated discrimination between two external sources: each item in a list of words was spoken in either a male or a female voice. Subjects received a test of item recognition and a test of source monitoring at each of four delay intervals (immediate, 30 min, 48 h, 1 week). In contrast with previous research, no evidence of differential forgetting rates for item and source information was found. With delay intervals of 0 and 48 h, Experiment 2 replicated Experiment 1 while adding a reality monitoring condition that required discrimination between an internal (i.e., self-generated) and an external source. Subjects were better at making internal-external discriminations than at making external-external discriminations, but both types of source monitoring declined at the same rate as memory for the items themselves.     

No Benefit of Eye-Closure Rehearsal in a Unimodal Recognition Memory Test for Word Items

Recent studies have suggested that closing the eyes helps memory retrieval in recall tests for audiovisual clips that contain multimodal information. In two experiments, we examined whether eye-closure improves recognition memory performance for word lists presented unimodally (i.e., visually or aurally). In the encoding phase, participants saw or heard a list of unrelated, meaningful word items. After a fixed retention interval of 1 week (Experiment 1, n = 110) and 5 min (Experiment 2, n = 44), the participants were asked to mentally rehearse the items with their eyes open or closed, and then they performed a recognition test. The results revealed no effect of eye-closure rehearsal on recognition performance. We discuss the possible reasons why no eye-closure benefit was found in recognition memory tests for unrelated word items.     

Temporal–contextual processing in working memory: Evidence from delayed cued recall and delayed free recall tests

Three experiments are reported that addressed the nature of processing in working memory by investigating patterns of delayed cued recall and free recall of items initially studied during complex and simple span tasks. In Experiment 1, items initially studied during a complex span task (i.e., operation span) were more likely to be recalled after a delay in response to temporal–contextual cues, relative to items from subspan and supraspan list lengths in a simple span task (i.e., word span). In Experiment 2, items initially studied during operation span were more likely to be recalled from neighboring serial positions during delayed free recall than were items studied during word span trials. Experiment 3 demonstrated that the number of attentional refreshing opportunities strongly predicts episodic memory performance, regardless of whether the information is presented in a spaced or massed format in a modified operation span task. The results indicate that the content–context bindings created during complex span trials reflect attentional refreshing opportunities that are used to maintain items in working memory.