Temporal discrimination and a free-operant psychophysical procedure.

Pigeons were presented a series of keylight time periods (separated by blackouts) during which two response keys were lit, one by blue light and the other either by orange or green. Blue-key responses changed the color on the other key. Orange-key responses sometimes produced food during the first half of a time period; green-key responses sometimes produced food during the second half. In three experiments, the probability of a green-key response increased as a function of elapsed time. Experiment 1 compared performance when the duration of the keylight periods was varied across a wide range. Discrimination of performance was similar across the range of durations. Experiment 2 varied both relative reinforcement rate and the local reinforcement rate for orange-key and green-key responses. These manipulations produced changes in response bias but not discrimination sensitivity. Experiment 3 varied the local temporal placement of reinforcers within time periods and demonstrated that choice behavior was affected by differential reinforcement at different points during the time periods. The results were consistent with previous research on duration discrimination that used psychophysical trials procedures.     

Pure timing in temporal differentiation

Temporal control appears to depend on whether the critical durations are those of stimuli or those of responses. Stimulus timing (temporal discrimination) supports Weber's law, whereas response timing (temporal differentiation) indicates decreasing relative sensitivity with longer time intervals. The two types of procedure also yield different conclusions in scaling experiments designed to study the functional midpoint of two or more durations (temporal bisection procedures). In addition, the fractional-exponent power relation between emitted and required duration usually found with animals in differentiation experiments conflicts with deductions from formal analyses. The experiment reported here derived from considering differentiation arrangements as schedules of reinforcement. When analyzed from this perspective, the procedures are tandem schedules involving a required pause followed by a response, and it is the pause alone that involves temporal control. A choice procedure separated timing from responding, and enabled observations of pause timing in isolation. Pure temporal control in differentiation consisted of linear overestimation of the standard duration, and Weber's law described sensitivity. These results indicate that the two problems, the fractional-exponent power relations and the apparently different nature of sensitivity in differentiation and discrimination, disappear when temporal control is observed alone in differentiation.     

语言理解中语义整合的神经机制

语义整合是语言阅读理解中非常重要的环节。随着认知神经科学技术的广泛应用,当前关于语义整合的研究取得了长足进步,各种模型层出不穷。但是不同模型对于语义整合的功能定位及其内在机制却存在较大的争议。本文首先介绍当前关于语义整合的主要模型,然后对当前不同理论模型之间关于语义整合的界定,以及语义整合的功能定位是在额下回还是颞叶的争论进行了分析。我们认为,关于语义整合的实质、语义整合的功能网络将是未来研究的主要方向,相关的研究对于语言理解理论的发展将具有重要的启示。     

解释水平对品牌联想和品牌延伸评估的影响

由于人们更加关切与其解释水平相匹配的信息、经验和事物, 解释水平能够系统性地影响人们的判断与决策。本研究将解释水平视为重要的调节变量, 探查它对消费者的品牌联想和品牌延伸评估的可能影响。实验一用于检验来源于个体差异的不同解释水平(高与低)的被试, 对于同一品牌是否产生不同形态(原型性与范例性)的品牌联想以及探查它们之间的相对数量关系。实验二采用2(解释水平：高vs.低)×2(契合类型：原型性契合vs.范例性契合)组内和组间因子混合设计, 用于检验基于时间距离的解释水平是否调节契合类型对品牌延伸评估的影响关系。实验研究结果发现：在接触到品牌名称时, 具有高水平解释倾向的消费者, 将比低水平解释倾向的消费者, 呈现更多的原型性联想; 而具有低水平解释倾向的消费者, 将比高水平解释倾向的消费者, 呈现更多的范例性联想; 在低水平解释条件下, 消费者对范例性契合延伸产品的评估要好于对原型性契合延伸产品的评估; 而在高水平解释条件下, 消费者对原型性契合延伸产品的评估要好于对范例性契合延伸产品的评估。     

3-6年级小学生师生关系:结构、类型及其发展

本研究采用师生关系教师评定量表,由14名班主任教师对498名3-6年级学生与教师的关系进行评价.结果表明:(1)师生关系量表具有较好的信度和效度,师生关系特点主要表现在冲突性、亲密性和反应性三个维度上.(2)快速聚类分析的结果表明,3-6年级学生的师生关系可划分为3种类型:冷漠型、冲突型、亲密型,其分布比例分别为23.0%、33.7%、43.3%.(3)师生关系随学生年级增长而变化.在师生关系各维度及总分上,存在显著的年级差异.随年级的上升,积极师生关系类型的比例逐渐下降,而消极师生关系类型的比例逐步上升.     

自尊水平、事件效价与时距对过去事件时距估计的影响

在西方文化背景下提出的时间自我评价理论认为,人们为了维护当前积极自尊,主观上会远离过去失败而亲近过去成功。本研究采用线段评估法,选取311名中国大学生被试,通过两个实验考察自尊水平、事件效价与时距对过去事件时距估计的影响,以检验该理论的文化普适性。结果表明:对过去事件的时距估计,自尊水平、事件效价及其交互作用在同一时距里均不存在显著差异;时距的主效应及其与事件效价的交互作用均显著,在负效价水平上存在显著时距差异,在正效价水平上无显著时距差异。研究结果不支持基于西方文化背景下的时间自我评价理论。     

大学生气质类型、父母教养方式与孤独感的关系研究

采用量表法以349名大学生为被试研究了气质类型、父母教养方式和孤独感的关系.(1)差异检验表明:女性大学生的亲情孤独感、总体孤独感多于男生,且气质类型上更情绪化;城市大学生的社会性得分显著高于来自乡村大学生;在爱情孤独和总体孤独感上存在显著的专业差异,理工类大学生体验到更多的孤独感尤其是爱情孤独感.(2)相关分析表明:大学生孤独感的各个维度与其气质类型中的社会性以及父母教养方式中的大多因素显著相关.(3)回归分析进一步表明:母亲情感温暖对总体孤独感有显著预测作用;母亲情感温暖、父亲严惩、母亲干涉保护对亲情孤独感因子有显著预测作用;社会性、父亲严惩对爱情孤独感因子有显著预测作用;母亲情感温暖、母亲干涉保护、父亲干涉对社交孤独感因子有显著预测作用.     

3～6年级学生及其教师对师生关系知觉的比较研究

采用师生关系学生知觉和教师知觉问卷,分别由508名3~6年级学生及其16名班主任教师对两者之间的关系进行评价,结果表明:(1)教师和学生知觉的师生关系具有相似的结构成分:亲密性、冲突性和反应性;(2)学生知觉到的师生关系与教师知觉到的师生关系特点有显著的不同:相对于教师而言,4~6年级学生知觉到的师生关系更为消极;而3年级学生知觉到的师生关系则更为积极.(3)快速聚类分析的结果表明,教师知觉和学生知觉的师生关系可以聚为两种相同的类型:亲密型和冲突型.教师和学生知觉类型一致的比例为62.5%;不一致类型的比例为37.5%.(4)在师生关系的类型上,三年级学生知觉到的亲密型比例显著高于教师知觉,而冲突型比例则显著低于教师知觉;六年级学生与此相反.     

The hope of the future: The experience of pregnancy influences women’s implicit space–time mappings

It has long been observed that speakers employ spatial concepts “front” and “back” to talk about temporal concepts “past” and “future.” However, the direction of space-time mappings varies across cultures. According to Temporal Focus Hypothesis (TFH), people’s implicit associations between space and time are conditioned by their temporal focus. Here we tested whether pregnancy can affect Chinese women’s temporal focus and thereby influence their space-time mappings. One of the most striking characteristics of pregnant women noted by previous research is their future-oriented thought. Based on this, we predicted that pregnant women should be more future-focused. Consistent with this prediction, the results demonstrated that pregnant women tended to be more future-focused than non-pregnant women and demonstrated a greater tendency to conceptualize the future as in front of them, supporting the TFH. The current research offers a new perspective that culture-external factors such as pregnancy can also influence people’s spatialization of time.