Effects of Practice upon the Metabolic Cost of Mental Work

Two experiments with isopods, Armadillidium vulgare, were reported. In Experiment I, two groups of five Ss each learned to run a T maze to escape light and heat. Both original learning (OL), and relearning (RL) the next day, were to a criterion 9/10 correct. Between OL and RL one group was immobilized (I), and the other group was given the opportunity for activity (A). The I treatment resulted in greater savings on RL than did the A treatment, and it was thus concluded that A is a retroaction treatment. Experiment II was like I except that all Ss were extinguished immediately following OL, and then given either A or I until RL. In this experiment, the A treatment led to no savings, but the I treatment produced negative savings (more trials on RL relative to OL). It was concluded that the A treatment had retroactively interfered with extinction, and this result was discussed as analogous to differential spontaneous recovery in favor of the A group. It was concluded that Liberman's (4, 5) theory (that spontaneous recovery is due to the forgetting of extinction) is supported by the result of Experiment II.     

Music Training and Semantic Clustering in College Students

College students with 5 or more years of music training recalled significantly more words from a 16-item word list than did students with 0-4 years of training. The superior recall of the extensively trained students linked to better application of a semantic-clustering strategy across a series of 3 test trials. Music education and language experience may have similar influences on the development of verbal memory.     

语义通达对语言标识效应产生的必要作用

大量研究表明语言标识对情绪体验具有调节作用,但并未深入分析这种调节效应产生的内在机制。本研究自下而上操纵标识词的形、音、义信息,探察不同效价情绪的标识效应产生对词汇形、音、义信息的依赖性。结果发现,与仅具有音、形信息的假词相比,真词作为标识词时可以显著降低被试对负性图片的消极体验。表明词汇语义信息的通达是标识效应产生的必要条件,仅具有词汇音和形的信息不足以产生标识效应。     

新颖语义联结在顿悟促进记忆效果中的作用

采用成语谜题选择任务, 通过学习-测验范式探究顿悟促进记忆的认知神经机制。实验1采用行为实验, 验证成语谜题选择范式在探究顿悟促进记忆中的有效性, 结果显示, 相比于寻常联结条件, 新颖联结条件下被试在学习阶段具有更高的顿悟感得分, 在测试阶段具有更高的正确率, 范式的有效性得以验证。实验2采用fMRI技术探究顿悟促进记忆的关键脑区。结果显示, 相比于失败记忆新颖联结条件, 成功记忆新颖联结条件更强地激活了顿悟过程相关脑区, 包括海马、杏仁核、额中回、颞上回和颞中回。这说明在学习阶段的顿悟问题解决过程中, 对信息的深加工与积极情绪促进了随后的记忆; 对其进一步分析发现, 相比于寻常联结记忆, 新颖联结对记忆的促进效应主要与右侧海马激活有关, 它可能反映了在顿悟问题解决中新颖联结形成过程建立了情节记忆以及新颖且有价值的语义联结。研究结果表明新颖语义联结形成在顿悟促进记忆中发挥了重要作用。     

人如其食：食物性别刻板印象及对人物评价的影响

食物在社会生活中发挥着重要作用, 具有性别文化意义。两个研究分别探索了外显与内隐食物性别刻板印象的存在及其对人物评价的影响。研究1采用提名法、自我报告法和语义启动范式检验外显和内隐食物性别刻板印象的存在, 结果表明被试均持“男性偏好男性化食物, 女性偏好女性化食物”的外显食物性别刻板印象, 女性被试持有内隐食物性别刻板印象。研究2采用情境实验法和内隐关系评估程序进一步测量被试对食物性别刻板不一致目标人物在热情和能力维度上的评价, 结果发现人们对食物性别刻板不一致男性在热情维度的内隐评价更加积极。     

汉字刺激质量与语义启动间的交互作用

本研究探讨汉字刺激质量与语义启动的相互作用,深入考察汉字识别的内在机制。实验采用真假字判断范式,实验1使用语义相关词对比率较高的实验材料,实验2使用语义相关词对比率较低的实验材料,结果发现：（1）无论语义相关词对比率高还是低,均存在语义启动效应和刺激质量效应,且汉字刺激质量与语义启动之间均存在交互作用;（2）轻度模糊刺激较重度模糊刺激受到的语义启动效应更大。结果表明,即使排除了额外反馈的作用,汉字刺激质量与语义启动之间仍存在交互作用,进一步支持交互激活模型。     

知识整合的时间进程：ERP研究

本研究借助ERP技术,采用分离句子范式,考察了被试通过整合主干事实生成新知识的时间进程。结果发现：（1）知识整合事实相对于传递性推理事实和新颖事实诱发了更小的N400,与众所周知事实没有显著差异,表明通过整合生成的新信息已经快速纳入了语义知识库;（2）对比两次呈现,延迟性整合事实在第二次呈现的350ms之后波幅显著下降,与众所周知事实没有显著差异,表明知识经验影响了整合的时间进程,相较两个新信息之间的即时整合,新旧信息之间的延迟整合需要更多的时间。