假设检验思维策略的发展研究

运用自编的一个关于规则发现的计算机程序,研究了小学生、中学生和大学生解决问题过程中的形成假设、设计实验、实验检验三个阶段上的“假设－检验”思维策略。结果发现,小学生的假设检验能力比较低,中学生的水平有了明显的发展,中小学阶段是培养儿童科学发现的假设检验能力的关键期。     

假设形成与检验的神经机制

假设形成与检验是解决任何复杂问题的重要思维工具, 是人们发现规则, 形成概念, 建立假说, 获得知识的基础。为进一步考察这一思维能力的神经机制, 本项目在已有行为及脑电研究的基础上以“类别概括－规则发现”为研究范式, 给被试提供包含多个知觉维度的刺激, 要求被试通过知觉观察与反馈学习发现基于类别的规则(假设)。本项目重点考察被试在此任务中选择与收敛假设,以及加工否定(冲突)信息的脑机制, 并尝试揭示假设形成与检验的个体发展特征。     

复杂规则内隐学习机制的实验研究

本研究利用传统的概念形成实验,在内隐指导语下进行实验,试图检验概念形成中的内隐学习效应,并讨论概念复杂程度与内隐学习效率之间的关系,从而初步探讨复杂规则获得中的“内隐表征”机制。我们的基本假设是：概念形成中的内隐学习是对具体刺激特征的表征过程;内隐学习只能一定程度上掌握复杂规则中的一部分。     

风险决策和跨期决策的过程比较：以确定效应和即刻效应为例

风险决策和跨期决策与人类生存发展密切相关, 且两类决策在理论发展、行为效应及神经基础等方面具有相似性。为检验二者是否具有共同过程机制, 本研究以风险决策中的确定效应和跨期决策中的即刻效应为例, 采用眼动追踪技术比较了它们的局部、整体过程及模型拟合。辅以贝叶斯因子分析实验数据表明：二者的主要过程特征均相似, 且更符合非折扣模型假设; 二者在加工复杂程度等少数特征上有所不同; 确定和即刻信息在加工方向等特征上存在特异性。这表明二者可能具有共同的核心决策规则：两类决策更可能遵循非折扣模型预期的简捷、启发式规则, 而不是折扣模型所假设的补偿性、基于选项规则。本研究为建立两类决策的共同解释框架做出了有益尝试, 并为决策比较研究方法提供新的方向。     

嵌套范式下视空工作记忆对基于规则类别学习

基于COVIS模型与认知加工阶段假设,通过2个实验探讨嵌套范式下, 视空工作记忆对基于规则类别学习的影响。实验1采用类别学习中嵌套视空工作记忆的范式,结果发现视空工作记忆削弱基于规则类别学习成绩,与COVIS模型预测相一致。实验2则采用视空工作记忆中嵌套类别学习任务的范式,结果却发现视空工作记忆对基于规则类别学习的影响消失。实验结果表明嵌套范式下视空工作记忆的位置影响基于规则类别学习,初步验证了类别学习存在多个认知加工阶段的假设,视空工作记忆主要影响基于规则类别学习中规则的发现和检验阶段。     

嵌套范式下视空工作记忆对基于规则类别学习的影响

基于COVIS模型与认知加工阶段假设,通过2个实验探讨嵌套范式下,视空工作记忆对基于规则类别学习的影响。实验1采用类别学习中嵌套视空工作记忆的范式,结果发现视空工作记忆削弱基于规则类别学习成绩,与COVIS模型的预测相一致。实验2则采用视空工作记忆中嵌套类别学习任务的范式,结果却发现视空工作记忆对基于规则类别学习的影响消失。实验结果表明嵌套范式下视空工作记忆的位置影响基于规则类别学习,初步验证了类别学习存在多个认知加工阶段的假设,视空工作记忆主要影响基于规则类别学习中规则的发现和检验阶段。     

跨期决策中的维度差异偏好：眼动证据

在跨期决策研究领域,虽然基于维度的跨期模型得到了一些源自结果检验和过程检验的证据支持,但此类模型所假设的维度间差异比较的心理过程尚缺乏直接的过程证据。本研究通过两个眼动实验,系统考察了相关眼动指标对维度差异偏好的预测效应。结果发现,根据基于维度的权衡模型可有效拟合出个体在跨期决策中的维度差异偏好,并且反应时、眼跳注视熵和静态注视熵等指标均与维度差异偏好负相关,而基于维度的注意分配与维度差异判断正相关。这些研究发现支持了本研究所提出的跨期眼动模型的相关假设,证实了维度差异偏好与跨期决策的认知加工过程之间的联系,为基于维度的跨期模型提供了更直接的过程证据,并为今后跨期决策的眼动模型发展指明了新方向。     

一个科学概念形成过程的初步实验研究

1　前言　　由Ｌ .Ｂｏｕｔｈｉｌｅｔ所首创的假设检验模型 (ＴｈｅＨｙ ｐｏｔｈｅｓｉｓｔｅｓｔｉｎｇｍｏｄｅｌ)认为 :在概念的形成过程中 ,概念的学习者作为一个问题的积极解决者出现。学习者不断地产生和检验假设 ,这些假设都是关于确定概念属性的规则和方式 ,每一个成功的假设都通过运用它把事物分为可以作为概念的例子或不可作为概念的例子两类而得到检验。无论何时 ,一个不能成功分类的假设就会被抛弃 ,而一个新的假设就会产生 ,直到正确的假设被发现为止。多年来 ,这种假设检验模型已被许多研究者的研究所支持。科学概念形成的…     

权力与耐心：权力感对时间知觉与跨期决策的影响

已有研究发现高权力感会使个体更耐心,更偏好延迟的大奖励。本研究假设高权力感导致耐心也会体现在时间知觉上,并且时间知觉是高权力导致耐心的心理机制。研究通过考察权力感对时间知觉与跨期决策的影响,以及时间知觉的中介作用对此假设进行了检验。实验1通过回忆法启动权力感,检验权力感对时间知觉的影响;实验2采用角色扮演法启动权力感,考察权力感对跨期决策的影响,并检验时间知觉的中介作用。结果发现：相比低权力感,高权力感个体感觉时间过得更快,进而使个体在跨期决策中更偏好延迟的大奖励,权力感并不直接影响跨期决策。研究揭示了权力感对时间知觉的影响,为权力感影响耐心行为的解释提供了时间知觉的新视角。     

论科学研究中的方法论和科学知识的内容之间的关系

科学实质上是由通常称作科学方法的那种东西来表现其特征的。这个方法的主要内容是关于如何着手进行科学研究、如何评价这样做所得到的成果及在这样的评价的基础上如何修改人们的后继的工作的一组部分默认的和部分明白表出的一般的规则、准则和指示。例如,人们应当作实验,提出解释这些实验成果的假设,用实验检验这些假设,放弃那些不能确立的假设,提出新的假设以解释新的实验,等等。     

EFFECTS OF PERCEPTUAL QUALITY AND TASK DIFFERENCE ON THE HEMISPHERIC PROCESSING OF WORD STIMULI

Three experiments were conducted to examine the effects of stimulus exposure duration, retinal eccentricity, visual noise and task differences (physical classification and semantic classification) on the processing of Kana (Japanese phonetic symbol) words presented to the left and right visual fields. The primary findings of the three experiments were as follows. The right visual field advantage was found in the shorter exposure duration but no visual field difference was shown in the longer exposure duration condition (experiment 1). Stimulus presentation to large and small retinal eccentricity conditions revealed similar visual field difference (experiment 2). No significant visual field difference was shown in both clear and blurred stimulus presentation conditions (experiment 3). Semantic classification task revealed a right visual field advantage in all experiments whereas no visual field difference was shown in physical classification task in experiments 2 and 3. These results were discussed in terms of spatial frequency hypothesis and levels of processing hypothesis.     

Anxiety and the selective processing of emotional information: mediating roles of awareness, trait and state variables, and personal relevance of stimulus materials.

Previous research has established that anxiety patients demonstrate a cognitive bias that selectively favours the processing of threat related information. The current experiment employs a variant of a well established colour naming paradigm to address three issues concerning the nature of this anxiety linked pattern of selective processing. First, by considering non-clinical subjects and employing an experimental design capable of dissociating the influence of state and trait anxiety, the current study addresses the hypothesis that state anxiety elevations will elicit differential patterns of selectivity in high and low trait anxious subjects. Second, by presenting stimulus materials within or outside awareness, the study addresses the hypothesis that these processing biases occur automatically, without requiring the use of consciously mediated strategies. Third, by including both emotionally valenced stimulus materials which are related to, and which are unrelated to, the particular source of stress experienced by the subjects, the experiment addresses the hypothesis that such anxiety linked processing biases will be restricted to materials falling within the domain of current personal concern. The results of the present study clearly demonstrate that these three issues are not independent. Fundamentally different patterns of anxiety linked selective processing were observed when stimuli were presented outside awareness, permitting only automatic cognitive processing, and when stimuli were presented within awareness, permitting the use of consciously mediated strategies. The relative roles played by state and trait variables, and the degree to which these effects were influenced by the personal relevance of the stimulus materials, differed in each case. The implications of these findings for future research in this field are discussed.     

情感强度不同负性生活事件对个体情感反应和行为选择的影响

采用系列实验方法探讨不同情感强度负性生活事件对个体情感反应和行为选择的影响。结果发现：（1）复合生活事件（1高负性+1低负性）为异类时,个体对复合事件的负性感受比单独1高负性事件更低,选择经历前者,出现平均效应;（2）复合生活事件为同类时,其负性感受比单独1高负性事件更高,选择经历后者,出现累加效应;（3）复合事件有明显的时间特点时,其情感和行为选择受事件发生时间影响,符合峰-终定律。结论：人们对负性生活事件的加工受其特点的影响,加工方式不同。     

Relative salience affects the process of detecting changes in orientation and luminance

This study tests the effect of relative saliency on perceptual comparison and decision processes in the context of change detection in which distinct visual mechanisms process two features (e.g., luminance and orientation). Townsend and Nozawa's (1995) systems factorial technology was used to investigate the process architecture and stopping rule when deciding whether luminance or orientation of a Gabor patch had changed. Experiment 1 found individual differences in decision strategies when we did not control relative saliency. One group of participants adopted co-active processing, and the other group adopted serial self-terminating processing to detect the change signals. When Experiment 2 eliminated the relative saliency, all but one observer adopted parallel processing and followed a self-terminating rule. These results support the relative saliency hypothesis and highlight the fact that observers adopt different change-detection strategies for two features, especially when relative saliency exists between the two feature dimensions.     

线索强度:检验提取练习效应内部机制的重要变量

研究采用提取练习效应研究的经典范式,通过比较学习材料的线索强度对不同学习策略效果的影响来探讨提取练习效应的内部机制。结果发现：（1）当最终测试为线索回忆时,线索强度与学习策略交互作用显著,强线索条件下两组成绩差异不显著,弱线索条件下提取练习组显著高于精细加工组;（2）当最终测试为再认测验时,线索强度与学习策略在虚报率和目标词再认反应时上交互作用显著,精细加工组在弱线索条件下的虚报率显著高于强线索条件,在强弱线索条件下的目标词再认反应时差异不显著;提取练习条件组在强弱线索条件下的虚报率差异不显著,在强弱线索条件下的目标词再认反应时差异边缘显著,弱线索条件下反应时要比强线索条件下更长。上述结果表明材料的线索强度是区分提取练习与精细加工的重要变量,揭示了提取练习的内部加工机制不同于精细加工,反驳了精细提取假设,支持情景语境假设。     

记忆编码策略对心境一致性记忆的调节作用

情绪对记忆的影响会受记忆编码策略的调节。本研究通过2个实验探讨编码策略对心境一致性记忆的调节作用。实验1和实验2均采用2（编码策略：提取练习策略、重复学习策略）×2（词性：消极词、中性词）的实验设计,分别探讨了不同记忆编码策略对普通大学生（实验1）和非临床抑郁大学生（实验2）心境一致性记忆的影响。结果发现：无论是被成功诱导出抑郁情绪的普通大学生,还是非临床抑郁倾向大学生,使用重复学习策略时回忆出的消极词均显著多于中性词,表现出显著的心境一致性记忆,而使用提取练习策略时回忆出的消极词和中性词没有显著性差异,未表现出心境一致性记忆。实验结果表明,记忆编码策略对心境一致性记忆具有调节作用,提取练习策略能够抑制心境一致性记忆。研究结果指明了心境一致性记忆的边界条件,并对非临床抑郁个体的学习与记忆具有重要的启示。     

加工流畅性对学习判断字体大小效应的影响

以自定步调学习时间和习得试验次数为加工流畅性指标,通过操纵不同字号的词对考察了加工流畅性对学习判断字体大小效应的影响。结果发现：（1）字体大小影响学习判断,但不影响回忆成绩;（2）不同字体大小的词对在加工流畅性（学习时间和学习次数）上存在差异,仅自定步调学习时间测量的加工流畅性对学习判断字体大小效应有贡献。这些结果说明学习判断的字体大小效应是一种元认知错觉现象,部分支持了加工流畅性假说。     

Evaluation of hypotheses in concept identification

The aim of this paper is to investigate the nature of hypothesis evaluation in conceptual tasks, especially in the identification of bidimensional concepts. In such tasks, hypothesis testing is seen as being composed of sampling and evaluation stages. With complex problems only one hypothesis seems likely to be sampled on each trial, and it is suggested that this hypothesis is evaluated according to a statistical decision-making process. In Experiment I, Ss were given an initial hypothesis involving one of eight rules and required to test it in an attempt to find a concept. When this given hypothesis was true (i.e., the concept), no difference was found between rules for the number of instances selected to the criterion of solution. Moreover, there was a tendency for Ss to choose instances which were predicted to be positive according to the hypothesis under test. Experiment II examined the role of memory in hypothesis testing. Immediate recall of instances selected revealed no difference between true and false hypotheses. Both primacy and recency effects were evident in recall. The number of instances correctly recalled was more than expected by models of hypothesis sampling and evaluation, and this was attributed to Ss having a low criterion for recall without intrusions. Examination of intrusions suggested that Ss may have retained some, but not all, of the features of the stimuli selected. Some differences were found between rules and between positive and netative instances on recall. These effects were suggested to be due to different amounts of information processing when classifying each type of instance for each rule; the results of Experiment III supported this suggestion.     

Spatial memory by blind and sighted children.

Non-verbal recall of haptically presented spatial positions by three age groups of blind and sighted children was tested under conditions varying cueing, recall type and stimulus position in a within-subject design. Slighted status was not only significant, but interacted significantly with recall type, and further with stimulus position, consistent with sequential haptic by blind and quasi-simultaneous visual processing by sighted children. Age was significant, but its only significant interaction was a relatively small one with cueing conditions and stimulus position, suggesting that the oldest group, regardless of sightedness, used verbal strategies in pre-cued conditions. The findings support the hypothesis that visual and haptic modalities of representation have demonstrably different effects on processing and efficiency in spatial recall, but counterindicate the hypothesis that these relate differentially to age. Results also suggest that a combination of cue utilization and verbal strategies is a significant, but relatively minor, factor in improvements in spatial recall.     

Age-related differences in reaction time task performance in young children

Performance of reaction time (RT) tasks was investigated in young children and adults to test the hypothesis that age-related differences in processing speed supersede a “global” mechanism and are a function of specific differences in task demands and processing requirements. The sample consisted of 54 4-year-olds, 53 5-year-olds, 59 6-year-olds, and 35 adults from Russia. Using the regression approach pioneered by Brinley and the transformation method proposed by Madden and colleagues and Ridderinkhoff and van der Molen, age-related differences in processing speed differed among RT tasks with varying demands. In particular, RTs differed between children and adults on tasks that required response suppression, discrimination of color or spatial orientation, reversal of contingencies of previously learned stimulus-response rules, and greater stimulus-response complexity. Relative costs of these RT task differences were larger than predicted by the global difference hypothesis except for response suppression. Among young children, age-related differences larger than predicted by the global difference hypothesis were evident when tasks required color or spatial orientation discrimination and stimulus-response rule complexity, but not for response suppression or reversal of stimulus-response contingencies. Process-specific, age-related differences in processing speed that support heterochronicity of brain development during childhood were revealed.