项目在不同间隔时间呈现过程中的系列位置效应

以中国汉字为材料,考察不同中数比率（０．６,０．８和１．０）时,系列位置曲线不同部分性质的分化,结果说明,系列位置曲线不同部分的性质,是项目间隔时间和其时间变化的中数比率共同作用的结果,发现项目间隔时间变化中数比率所起作用更大,在项目呈现时间相同时,项目隔间的时间长短,决定项目之间的辨别程度,也影响到对项目正确提取的百分数。     

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。     

首因效应向近因效应转换的实验研究

实验1以汉字与英文字母为材料,考察了自由回忆中学习与测验之间不同时间间隔（Os与10s)条件下的成绩,发现了首因效应向近因效应的转换,且它不受材料意义的影响。实验2对首因向近因效应转换的机制作了初步的探讨,排除了由于两种时间间隔被试采用不同顺序的提取策略造成首因向近因转换的可能性。     

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。     

位置特异性和项目呈现方式对即时情景记忆顺序重构的影响

在Healy等人(2008)的实验范式基础上,以中文姓名作为实验材料,探究位置特异性和项目呈现方式对即时情景记忆的影响。两个实验都要求被试对所呈现的20个姓名中的12个进行顺序重构。重构的12个位置分别为1-12、5-16、9-20三个水平,这三组位置同时包括绝对位置9-12。实验1采取视觉呈现,比较三个任务类型上重构正确率的差异。实验1的结果支持Healy的编码特异性理论,但是末尾呈现的项目仅有较小的重构优势。实验2采取听觉呈现,结果发现,在系列位置5-16上出现了较明显的近因效应,而在位置9-20上并无明显的近因效应。这表明位置特异性理论对顺序重构的影响主要表现为绝对位置的特异性而并非相对位置的特异性,系列位置效应出现在记忆的编码过程而不是提取过程。     

事件工作记忆的近因效应

顺序效应是工作记忆研究中值得关注的问题。本研究考察事件工作记忆的顺序效应。实验采用工作记忆变化觉察范式,要求被试记忆序列呈现的五个生物运动事件。正确率和反应时的结果一致发现,仅序列中最后一个事件的正确率显著高于其他位置,而反应时显著低于其他位置,即事件的序列工作记忆存在显著近因效应,但没有首因效应。事件工作记忆的顺序效应与其他视觉客体（如色块、朝向）类似,而与事件长时记忆的顺序效应不同。     

无关言语对汉字短时记忆系列回忆的影响*

采用视觉呈现字表和听觉呈现无关言语方式,探讨在字表项目保持期间阻止被试复述情况下,不同呈现位置的无关言语对汉字短时记忆系列回忆的影响。在字表保持期间,采用计算任务进行分心作业。实验结果发现：(1)无关言语对汉字短时记忆系列回忆成绩存在显著影响;(2)在字表保持期间阻止被试进行复述消除了字表呈现期间呈现无关言语对回忆成绩产生的干扰效应;(3)汉字短时记忆系列回忆成绩表现出系列位置效应。实验结果没有完全支持客体情节记忆模型。     

SPT效应的自动突显机制:来自输出监测的证据

研究采用"对回忆的再认"范式,从输出监测的角度考察了操作效应的提取机制。实验1结果显示,被试操作任务条件下的自由回忆的系列位置成绩缺乏首因效应,却拥有扩展的近因效应;被试操作任务条件下的"对回忆的再认"成绩显著差于语词任务下的成绩,差异具体表现在组块2~9、10、11和12上,表明在上述组块,被试操作任务条件下的提取存在自动突显,即操作效应得益于这些组块在提取时的自动突显。实验2结果显示,在类别测验下,被试操作任务和语词任务的自由回忆成绩拥有相似的系列位置曲线,而"对回忆的再认"结果同实验1。研究认为自由回忆的系列位置效应与自动突显机制之间不存在直接的因果关系,而"对回忆的再认"范式则能敏感地测量出操作效应的提取机制。     

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;     

公众时间回溯式记忆的特点

采用事后回溯设计,考察了大学生公众时间回溯式记忆的特点。研究选取1995到2001年之间发生可辨别的新闻事件14项,要求被试对新闻事件的时序、时点和时距进行回忆。结果表明：（1）公众事件回溯式时点记忆的正确率随时间的远近发生变化,较远的时间回忆正确率低,而较近的时间回忆正确率较高,存在近因效应。（2）公众事件的回溯式时距估计受真实时距的影响,短时距容易被高估,长时距容易被低估。（3）公众事件的回溯式时序回忆存在近因效应和首因效应,被试对发生较远的事件总是倾向于估计得更远,对发生较近的事件也倾向于估计得较近。而对两者中间的事件的顺序估计较为混乱。（4）本实验研究的公众事件回溯式时间记忆符合时间的重构理论和分段综合模型。     

Auditory and visual serial position functions obey different laws

Rhesus monkeys were tested in serial probe recognition tasks with either travel slide pictures or natural sounds. Tests with four-item lists produced serial position functions that were essentially opposite in shape for the two modalities and changed in opposite ways with retention interval. For visual memory, the primacy effect grew and the recency effect dissipated with retention interval. Capuchin monkeys, humans, and pigeons showed similar results. For auditory memory with rhesus monkeys, the recency effect grew and the primacy effect dissipated with retention interval. These results taken together, along with results from rehearsal tests of monkeys and humans, implicate two passive memory processes with different time courses. Interference among items within auditory lists was manipulated by varying the time between items and categories of items. Interference across lists was manipulated by varying the item pool size and, hence, item repetitions. Changes in the auditory serial position functions indicated that proactive and retroactive interference may have been instrumental in these dynamically changing serial position functions. Implications for theories and models of memory are discussed.     

Presence and absence of serial position effects in short-term memory

The nature of serial position effects was examined with a method based on pooled observations. With standard list presentation procedures, primacy and recency effects in short and long-term memory were observed. When learning operations were directed away from end positions, by changes in presentation rate, by within-list repetitions, by focusing instructions, and by differential grouping of list items, the usual serial position pattern was found to be affected in several ways, primacy and recency effects often being absent. Attempts to create anchor points and to ascribe serial positions verbally, were generally found to favour recency over primacy effects. Taken as a whole, the results, all of them based on recall of lits given a single presentation, indicated that position phenomena are more easily influenced by functional than by structural factors. The findings were explained in terms of a two-stage conception of serial learning, doing without specific storage assumptions.     

Serial position memory in the visual—spatial domain: Reconstructing sequences of unfamiliar faces

In two studies we presented pictures of unfamiliar faces one at a time, then presented the complete set at test and asked for serial reconstruction of the order of presentation. Serial position functions were similar to those found with verbal materials, with considerable primacy and one item recency, position errors that were mainly to the adjacent serial position, a visual similarity effect, and effects of articulatory suppression that did not interact with the serial position effect or with the similarity effect. Serial position effects were found when faces had been seen for as little as 300 ms and after a 6-s retention interval filled with articulatory suppression. Serial position effects found with unfamiliar faces are not based on verbal encoding strategies, and important elements of serial memory may be general across modalities.     

Auditory List Memory in Rhesus Monkeys

Auditory memory of 2 rhesus monkeys was tested in a serial probe recognition task. Lists of four environmental or natural sounds were followed by a retention interval and a test. The test matched one of the list items on half of the trials. The retention interval was varied across sessions. Six experiments showed similar results and changes in the serial position function. At short retention intervals, there was good memory for first list items (primacy effect) and poor memory for last list items. At intermediate retention intervals, memory improved for last list items (recency effect). At long retention intervals (20 s and 30 s), the recency effect was strong, and the primacy effect had dissipated. These auditory primacy and recency effects and their changes with retention interval were opposite to those for visual memory. Implications for processes and mechanisms of memory are discussed.     

Metacognition and learning about primacy and recency effects in free recall: The utilization of intrinsic and extrinsic cues when making judgments of learning

Although memory researchers know about primacy and recency effects, it is unclear whether students are aware of these effects and incorporate them when making judgments of learning (JOLs). The present research examined how participants use serial position information (extrinsic cues) when making JOLs after studying each item and showed that participants rely on the intrinsic qualities of the items and underestimate primacy and recency effects. However, when participants made JOLs prior to studying each item and engaged in multiple study-test sessions, their JOLs accurately reflected recall, as well as when serial position information was explicitly provided during the study phase. The findings are interpreted in a cue utilization framework and suggest that under certain conditions, participants can predict primacy and recency effects.     

A parallel-processing model for scanning

A parallel-processing model for scanning is proposed wherein all items in the display set are processed together but with different time constants. The time constant for each item depends upon its serial position and is an additive combination of primacy and recency effects. The primacy effect is linear, and the recency effect is logarithmic. Scanning can either be exhaustive or self-terminating, and “multiple looks” may occur with negative probes. It is shown that this model predicts a linear relationship between reaction time and set size, parallel or 2∶1 slope ratios depending upon the proportion of multiple looks, and serial position effects if the scanning is self-terminating.     

Recency judgments as a function of word frequency: A framing effect and frequency misattributions

The effects of word frequency on judgments of recency of item presentation were examined in two experiments. Subjects in Experiment 1 were presented two mixed lists of high- and low-frequency words followed by a list assignment task for recognized items. It was found that subjects were biased toward assigning low-frequency words to the more recently presented list. Subjects in Experiment 2 were presented a single mixed list of high- and low-frequency words followed by either a relative recency of presentation judgment task or a relative primacy of presentation judgment task. Each word pair on the tests contained one high-frequency word and one low-frequency word. It was found that, for the recency judgment task, subjects were biased to select the low-frequency item as having been presented more recently. However, on the parallel primacy judgment task, there were no effects of word frequency; moreover, overall accuracy levels were higher with primacy than with recency instructions. We interpret the effects of word frequency on recency judgments in Experiments 1 and 2 in terms of a misattribution of frequency-related differences in recollection-based recognition. The finding that recency and primacy instructions produced different patterns of results provides further evidence (Flexser & Bower, 1974) for an effect on performance of the way in which the temporal judgment task was framed.     

Primacy and recency effects in nonhuman primates.

The reports of primacy and recency memory effects in nonhuman primates have been criticized because they have all used an initiating response. That is, the presentation of the to-be-remembered list of items was always contingent on a response being initiated by the nonhuman primate. It has been argued that this initiating response improves performance for early items in the list, resulting in the occurrence of the primacy effect, independent of any memory processing mechanism. This criticism was addressed in the present study by not using an initiating response prior to the presentation of the list. Nevertheless, both a primacy and a recency effect were observed in all 6 rhesus monkeys evaluated using a serial probe recognition task. Thus, the results are similar to those for humans, in that both primacy and recency effects can be obtained in nonhuman primates. A brief literature review is included, and it is proposed that the primacy and recency effects observed in humans, nonhuman primates, and infraprimates can be explained within the context of the configural-association theory.