时间焦点对前后方向上内隐时空映射的影响——来自汉族和羌族的证据

采用不同的研究方法考察汉族和羌族被试内隐时空映射的联结方向及其影响因素。实验1利用时间图表任务发现, 汉族被试对“过去在前”和“未来在前”两种内隐时空映射没有表现出明显偏好, 而羌族被试更加倾向于使用“过去在前”的内隐时空映射。由于二者均使用汉语, 但其内隐时空映射却存在差异, 显示出时间语言和时间思维的分离性。实验2利用时间焦点量表考察汉族和羌族被试对过去和未来时间的关注程度。结果发现, 前者对过去和未来的注意力程度相当, 而后者表现出较强的“过去朝向思维”, 说明文化中的时间焦点偏好可以较好地预测二者的内隐时空映射。实验3利用时间概念分类任务发现, 内隐时空映射有利于促进汉族和羌族被试时间概念的表征和加工, 出现了“隐喻一致性效应”。整个研究表明, 汉族和羌族文化中个体对待时间的态度可以决定其内隐时空映射联结方向, 支持“时间焦点假设”。     

强势品牌广告竞争的溢出效应

本研究探讨同一品类两个强势品牌广告竞争对弱势品牌产生的影响, 研究尝试将广告重复、广告长度作为操控广告竞争强度的具体手段, 运用感知到的广告竞争水平来表示广告竞争强度。研究结果表明, 同一品类两个品牌同时进行广告重复的水平不同, 可以导致被试感知到的广告竞争水平有显著差异, 广告重复次数越多, 被试感知到的广告竞争强度越高, 广告长度对感知到的广告竞争作用不显著。研究同时发现：随着两个强势品牌广告竞争强度的提高, 消费者对弱势品牌的品牌态度降低, 这表明强势品牌广告竞争对弱势品牌具有溢出效应。另外, 研究还发现产品涉入度和产品属性相似性对强势品牌广告竞争的溢出效应具有调节作用, 涉入度低的产品和属性相似性高的产品溢出效应更大。本研究丰富了溢出效应理论, 增加了溢出效应类别, 同时对同一品类内部的广告实践具有重要的指导意义。     

Arithmetic operation and working memory: differential suppression in dual tasks

The relationship between arithmetic function and working memory was examined using a dual-task paradigm for either phonological or visuo-spatial suppression. Simultaneous phonological rehearsal significantly delayed the performance of multiplication but not subtraction, whereas holding an image in the mind delayed subtraction but not multiplication. This result indicates that arithmetic function is related to working memory in a subsystem-specific manner: multiplication is more closely linked to phonological loop and subtraction to visuo-spatial sketchpad. Whereas this is not compatible with the notion that arithmetic is done on a unitary, amodal representation of numbers, it provides support for the triple-code and/or the modular processing models on human numerical cognition in which number representations are specific for input/output modality and arithmetic types.     

技术之后是法规和观念的更新--中国器官移植的重大进展

从我国器官移植的历史和现状出发,在器官移植的技术和基础研究有了理观念的更新.这种更新应建立在对器官移植的伦理思考和讨论的基础之上.2003年我国关于器官移植的法规和观念有了新的突破,有关的管理办法和条例也在草拟之中.中国政府和医学界对器官移植始终持积极和慎重的态度,所谓"中国移植和买卖死刑犯器官"完全是别有用心的捏造.     

Ratings of perceived exertion throughout an ultramarathon during carbohydrate ingestion

Ratings of perceived exertion (RPE) and their relation to selected physiological mediators during endurance exercise have been limited to laboratory settings. The present study characterized the pattern of change in perceptual responses and examined the relation between RPE and selected physiological variables during a long competitive sporting event, i.e., an ultramarathon race (68 km). A single-group design was employed in which all of the 28 subjects provided their perceptual ratings 11.9 +/- 0.2) and heart rate (HR) (138 +/- 3) periodically (every 5 km) throughout the ultramarathon, and selected physiological responses were measured before, once during (32 km), and immediately after the race. Runners drank approximately 1,000 ml of carbohydrate beverage each hour (60 gm carbohydrate hr.(-1)) and ate 2 or 3 carbohydrate gel packs per hour (25 gm each(-1)). RPE increased significantly throughout the course of the ultramarathon. No significant correlations were found between RPE and HR at any time throughout the ultramarathon. RPE averaged 10.4 +/- 0.4 at the beginning of the race (6.4 km) and 15.4 +/- 0.4 at the conclusion of the race. Subjects maintained 76.9 +/- 1.1% of maximal heart rate; however, there was a tendency for heart rate to drop significantly after 32 km. Significant time main effects were found for serum glucose, insulin, and cortisol throughout the race. However, no significant correlations were found between RPE and any of these physiological mediators. These data indicate that during an ultramarathon race there is a progressive increase in RPE without an accompanying increase in HR or decrease in blood glucose. Therefore, during competitive self-paced exercise the perceptual responses may be mediated through other neurological and physiological mechanisms.     

Does parental coaching affect children's false reports? Comparing verbal markers of deception

The present study examined differences in children's true and false narratives as a function of parental coaching by comparing the verbal markers associated with deception. Children (N = 65, 4–7 years old) played the same game with an adult stranger over three consecutive days. Parents coached their children to falsely allege that they had played a second game and to generate details for the fabricated event. One week after the last play session, children were interviewed about their experiences. For children with the least amount of parental coaching, true and false reports could be distinguished by multiple verbal markers of deception (e.g., cognitive processes, temporal information, self‐references). The fabricated reports of children who spent more time being coaching by a parent resembled their truthful reports. These findings have implications for real‐world forensic contexts when children have been coached to make false allegations and fabricate information at the behest of a parent.     

iTemplate: A template-based eye movement data analysis approach

Current eye movement data analysis methods rely on defining areas of interest (AOIs). Due to the fact that AOIs are created and modified manually, variances in their size, shape, and location are unavoidable. These variances affect not only the consistency of the AOI definitions, but also the validity of the eye movement analyses based on the AOIs. To reduce the variances in AOI creation and modification and achieve a procedure to process eye movement data with high precision and efficiency, we propose a template-based eye movement data analysis method. Using a linear transformation algorithm, this method registers the eye movement data from each individual stimulus to a template. Thus, users only need to create one set of AOIs for the template in order to analyze eye movement data, rather than creating a unique set of AOIs for all individual stimuli. This change greatly reduces the error caused by the variance from manually created AOIs and boosts the efficiency of the data analysis. Furthermore, this method can help researchers prepare eye movement data for some advanced analysis approaches, such as iMap. We have developed software (iTemplate) with a graphic user interface to make this analysis method available to researchers.     

When Self Is the Source: Effects of Media Customization on Message Processing

Customization of media technologies enables users to become active sources in the communication process. But, does this sense of “self-as-source” alter the way users process information received via customized interfaces? A between-subjects experiment (N = 146) was conducted to answer this question. Data indicate that the effect of self-driven customization (high vs. low self-as-source) on persuasive message processing is mediated by perceived identity. Those who experience high self-as-source tend to process messages less systematically, but perceive the message topic as more important and show greater intention to follow the suggestions of messages than those with a low sense of self-as-source, an effect that is mediated by perceived identity. Theoretical implications for persuasive technologies, dual process models, and the agency model of customization are discussed, followed by practical implications for communicators who wish to incorporate new media technologies into their social influence campaigns.     

A note on monotonicity of item response functions for ordered polytomous item response theory models

A monotone relationship between a true score (τ) and a latent trait level (θ) has been a key assumption for many psychometric applications. The monotonicity property in dichotomous response models is evident as a result of a transformation via a test characteristic curve. Monotonicity in polytomous models, in contrast, is not immediately obvious because item response functions are determined by a set of response category curves, which are conceivably non-monotonic in θ. The purpose of the present note is to demonstrate strict monotonicity in ordered polytomous item response models. Five models that are widely used in operational assessments are considered for proof: the generalized partial credit model (Muraki, 1992, Applied Psychological Measurement, 16, 159), the nominal model (Bock, 1972, Psychometrika, 37, 29), the partial credit model (Masters, 1982, Psychometrika, 47, 147), the rating scale model (Andrich, 1978, Psychometrika, 43, 561), and the graded response model (Samejima, 1972, A general model for free-response data (Psychometric Monograph no. 18). Psychometric Society, Richmond). The study asserts that the item response functions in these models strictly increase in θ and thus there exists strict monotonicity between τ and θ under certain specified conditions. This conclusion validates the practice of customarily using τ in place of θ in applied settings and provides theoretical grounds for one-to-one transformations between the two scales.