动机的结构与效应：基于动机连续体的视角

动机是影响学生学业成绩重要的非认知因素。通常认为动机对学习是有利的,但研究发现并非所有动机都是有益的,这提醒研究人员有必要区分出各种不同的动机类型。现有研究一致表明内部动机对学业成就具有积极且长期稳定的效应,而外部动机的效应尚存在争议。具体而言,有研究者认为外部动机对学业成就是有害的,但部分研究发现外部动机在某些特定情况下能够发挥着不可或缺的积极作用。 针对上述存在的争议,本研究梳理了“动机连续体”这一概念,从两个方面的研究来进行阐释。首先,从大理论的角度整合了动机的相关理论,以自我决定理论的动机连续体为基础,引出相关理论,如兴趣理论、目标理论、期望价值理论、自我价值理论、强化理论、社会认知理论等。这些理论可以解释动机连续体中一种或几种类型的动机。 其次,从动机的结构及其如何影响结果变量这一角度对上述理论及其应用进行总结,主要存在四个观点。传统的争论集中在单维结构和多维结构之间。单维结构认为内部动机和外部动机是相互对立的,即内部动机会促进绩效,而外部动机会降低绩效。多维结构认为内部动机和外部动机能够相互累加,都能促进绩效。近年来,研究人员提出了更复杂的结构来整合上述观点。譬如半辐射结构使用全局因子来表示动机的整体水平,同时允许特定因子表示具体动机类型。这种半辐射结构借用了双因子模型,提取了一个“自我决定因子”,同时允许每种特定动机类型具有自身独特的影响。此外,乘积模型表明这两种动机之间存在交互作用,即外部动机的对结果的影响会因个体内部动机水平的变化而变化,反之亦然。 综上所述,本研究总结了关于动机连续体的不同理论之间的优缺点,回顾了动机结构的不同假设及其应用。在不同学科中对动机的测量方式、动机对不同结果变量的不同影响以及动机的跨文化研究等问题仍然是目前研究的热点。对动机结构和效应的深入探讨可以更好地帮助研究人员将不同的理论应用于适当的情境中。     

非小细胞肺癌 EG FR 基因突变检测与临床意义

采用荧光PCR法对199例晚期非小细胞肺癌（NSCLC ）组织进行表皮生长因子受体（EGFR ）基因突变检测,分析EGFR基因突变的分布特征及其与临床病理特征的相关性。结果显示56例（28．1％）存在EGFR基因突变,其中27例（13．6％）为外显子19突变,25例（12．6％）为外显子21突变,2例为外显子18突变,1例外显子20突变,1例外显子18和20的共突变。另外,除广东及安徽省铜陵市外,辽宁地区NSCLC患者EGFR基因突变率及主要突变类型与其他地区相符,常见于外显子19、21突变,其中腺癌、不吸烟患者突变率更高,更适宜EGFR-TKI靶向治疗。     

Dispositional Mindfulness,Posttraumatic Stress Disorder Symptoms and Academic Burnout in Chinese Adolescents Following a Tornado: The Role of Mediation through Regulatory Emotional Self-Efficacy

Limited research has been conducted on dispositional mindfulness, posttraumatic stress disorder (PTSD) symptoms and academic burnout in Chinese adolescents following a tornado. The present study investigated the ways in which dispositional mindfulness is related to PTSD symptoms and academic burnout in Chinese adolescents following a tornado by considering the role of regulatory emotional self-efficacy. A total of 431 Chinese adolescents (mean age: 14.75 years) who had experienced a severe tornado 9 months prior to this study were recruited for this study. The results indicated that our model fit the data well [χ²/df = 2.774, CFI = 0.952, TLI = 0.934, RMSEA (90% CI) = 0.064 (0.051–0.077)], and revealed that regulatory emotional self-efficacy partially mediates the relationships between dispositional mindfulness and PTSD symptoms and academic burnout, respectively. The clinical implications and limitations of our research, and recommendations for future research, are discussed in this paper.     

工作家庭间跨界增益:逻辑主线与模型

已有工作家庭界面研究主要立足于冲突视角,近年来部分研究开始从积极视角揭示工作家庭关系的本质。工作家庭增益强调角色资源的跨界渗溢有助提升个体另一角色表现和生活品质的程度。工作家庭资源会增强个体心理资源,进而影响体验工作家庭间的跨界增益,资源的累积循环与工作家庭增益互为持续保障,跨界增益的程度受到工作家庭边界特征的调节影响。论证和提出了"角色资源累积-个体心理因素改变-跨界增益-角色评价与投入"的逻辑主线,以此构建工作家庭间角色资源跨界增益模型。     

恋人概念威胁启动削弱自我和恋人面孔优势效应:来自眼动研究的证据

采用眼动记录技术和恋人概念威胁启动范式探讨自我和恋人面孔优势效应的产生和维持过程。结果发现:与概念非威胁启动条件下相比,概念威胁启动条件下,被试搜索恋人面孔时的兴趣区个数和搜索自我面孔时的平均眼跳次数与搜索陌生人面孔时比差异变得不显著;恋人面孔与陌生人面孔在兴趣区内总注视时间上的差异变得不显著。结果表明,自我与恋人面孔存在注意的优先捕获和维持优势,恋人概念的威胁启动会减少对恋人的关注,证明了建立恋人的积极概念是恋人面孔优势效应产生和维持的重要原因。     

Polytomous multilevel testlet models for testlet‐based assessments with complex sampling designs

A pplications of standard item response theory models assume local independence of items and persons. This paper presents polytomous multilevel testlet models for dual dependence due to item and person clustering in testlet‐based assessments with clustered samples. Simulation and survey data were analysed with a multilevel partial credit testlet model. This model was compared with three alternative models – a testlet partial credit model (PCM), multilevel PCM, and PCM – in terms of model parameter estimation. The results indicated that the deviance information criterion was the fit index that always correctly identified the true multilevel testlet model based on the quantified evidence in model selection, while the Akaike and Bayesian information criteria could not identify the true model. In general, the estimation model and the magnitude of item and person clustering impacted the estimation accuracy of ability parameters, while only the estimation model and the magnitude of item clustering affected the item parameter estimation accuracy. Furthermore, ignoring item clustering effects produced higher total errors in item parameter estimates but did not have much impact on the accuracy of ability parameter estimates, while ignoring person clustering effects yielded higher total errors in ability parameter estimates but did not have much effect on the accuracy of item parameter estimates. When both clustering effects were ignored in the PCM, item and ability parameter estimation accuracy was reduced.