用结构方程建模(SEM)估计概化理论(GT)中的评分者信度

评分者的信度分析 ,已从经典测量理论的方法 (Kendall和谐系数 )发展为基于现代测量理论 (如GT)的方法 ,但由于GT中方差分量估计的工具和途径有限 ,使该方法的推广受到限制。本文介绍了结构方程建模 (SEM )估计GT中方差分量的必要性及原理 ,并通过对某省直国家机关公务员录用考试结构化面试的评分者信度分析 ,阐述用SEM估计概化理论中不同设计下的评分者信度研究     

Major depression can be prevented

The 2009 Institute of Medicine report on prevention of mental, emotional, and behavioral disorders (National Research Council & Institute of Medicine, 2009b) presented evidence that major depression can be prevented. In this article, we highlight the implications of the report for public policy and research. Randomized controlled trials have shown that the incidence of major depressive episodes can be significantly reduced. Meta-analyses suggest that 22% to 38% of major depressive episodes could be prevented with currently available methods. We argue that if major depressive episodes can be prevented, the health care system should provide routine access to evidence-based depression prevention interventions, just as it provides inoculations for other common and debilitating health problems. At the same time, researchers should pursue the major directions advocated by the Institute of Medicine report to increase the enduring effectiveness of future prevention interventions. These directions include taking a developmental perspective, learning to identify groups at high risk, and testing evidence-based interventions that are likely to have the widest reach. Scientific evidence has shown that clinical depression can be averted. Our societies must take action to reduce clinical depression to the lowest possible level. This article is one of three in a special section (see also Biglan, Flay, Embry, & Sandler, 2012; Yoshikawa, Aber, & Beardslee, 2012) representing an elaboration on a theme for prevention science developed by the 2009 report of the National Research Council and Institute of Medicine.     

The Test of Time in School-Based Mentoring: The Role of Relationship Duration and Re-Matching on Academic Outcomes

The influence of match length and re-matching on the effectiveness of school-based mentoring was studied in the context of a national, randomized study of 1,139 youth in Big Brothers Big Sisters programs. The sample included youth in grades four through nine from diverse racial and ethnic backgrounds. At the end of the year, youth in intact relationships showed significant academic improvement, while youth in matches that terminated prematurely showed no impact. Those who were re-matched after terminations showed negative impacts. Youth, mentor, and program characteristics associated with having an intact match were examined. Youth with high levels of baseline stress and those matched with college student mentors were likely to be in matches that terminated prematurely, while rejection-sensitive youth and mentors who had previous mentoring experience were more likely to be in intact relationships. Implications for research and practice are discussed.     

How anxious and avoidant attachment affect romantic relationship quality differently: A meta‐analytic review

Adult attachment has been studied as an important predictor of romantic relationship quality in many empirical studies. This meta‐analysis quantitatively summarized the associations between the two insecure adult attachment dimensions, anxiety and avoidance, and cognitive, emotional, and behavioral indicators of romantic relationship quality based on 73 previous studies with 118 independent samples of 21 602 individuals. More importantly, we examined the different effects of anxiety and avoidance on relationship quality. We also tested the potential moderating effects of gender on the strength of these associations. Meta‐analytic results confirmed that both anxiety and avoidance were detrimental to the cognitive, emotional, and behavioral aspects of relationship quality. Compared with anxiety, avoidance was more negatively associated with general satisfaction, connectedness, and general support in relationships. In contrast, anxiety was more positively associated with general conflict in relationships. The moderating effect of gender was weak. However, supplementary analyses found that the type of couple interaction measures (self‐report versus observation) significantly moderated the relations between insecure attachments and the behavioral indicators of relationship quality. Our results integrate and extend previous findings about the dynamics of adult attachment and romantic relationship quality. Copyright © 2012 John Wiley & Sons, Ltd.     

Criminal Recidivism Among Hong Kong Male Juvenile Probationers

Hong Kong juvenile probationers are scarcely studied. The purpose of this study was to explore the 6-month short-term recidivism rate of 92 male juvenile probationers (aged 14–20?years), with and without controlling for their index crime. Generally, 30% of the juveniles reoffended within the 6-month follow-up period (82 and 18% were adjudicated of a nonviolent and violent offense respectively). Eight personality and psychosocial properties (self-esteem, life satisfaction, social bond, positive and negative affect, impulsivity, pro-offending attitudes, and self-perceived life problems) were assessed in both Wave 1 and Wave 2 periods. Only three properties (negative affect, self-perceived life problems, and self-esteem) yielded significant changes within the 6-month period. Beyond the exploratory analyses, another aim of this study was to identify significant predictors of recidivism in these rarely sampled juvenile probationers. Results indicated that type of crime, onset age of delinquent behavior, frequency of delinquency involvement in the past year, social bond, negative affect, impulsivity, and pro-offending attitudes were significant risk factors for recidivism. These findings highlight the need for social workers and other youth justice personnel to prioritize the intervention resources for juvenile probationers in light of the high estimated lifetime cost of crime for young offenders. Cognitive-behavioral treatment modalities with emphases on family functioning and problem-solving strategies were found to be an effective intervention approach for juvenile offenders. Limitations and future research directions are discussed.     

Glutamatergic activation of anterior cingulate cortex mediates the affective component of visceral pain memory in rats

Studies of both humans and animals suggest that anterior cingulate cortex (ACC) is important for processing pain perception. We identified that perigenul ACC (pACC) sensitization and enhanced visceral pain in a visceral hypersensitive rat in previous studies. Pain contains both sensory and affective dimensions. Teasing apart the mechanisms that control the neural pathways mediating pain affect and sensation in nociceptive behavioral response is a challenge. In this study, using a rodent visceral pain assay that combines the colorectal distension (CRD)-induced visceromotor response (VMR) with the conditioning place avoidance (CPA), we measured a learned behavior that directly reflects the affective component of visceral pain. When CRD was paired with a distinct environment context, the rats spent significantly less time in this compartment on the post-conditioning test days as compared with the pre-conditioning day. Effects were lasted for 14 days. Bilateral pACC lesion significantly reduced CPA scores without reducing acute visceral pain behaviors (CRD-induced VMR). Bilateral administration of non-NMDA receptor antagonist CNQX or NMDA receptor antagonist AP5 into the pACC decreased the CPA scores. AP5 or CNQX at dose of 400 mM produced about 70% inhibition of CRD-CPA in the day 1, 4 and 7, and completely abolished the CPA in the day 14 after conditioning. We concluded that neurons in the pACC are necessary for the "aversiveness" of visceral nociceptor stimulation. pACC activation is critical for the memory processing involved in long-term negative affective state and prediction of aversive stimuli by contextual cue.     

Epigenetic regulation of reelin and brain-derived neurotrophic factor genes in long-term potentiation in rat medial prefrontal cortex

Epigenetic mechanisms have recently been known to play fundamental roles in the regulation of synaptic plasticity, and learning and memory tasks in many brain regions, such as the hippocampus, the amygdala, the insular cortex. However, epigenetic mechanism in the medial prefrontal cortex (mPFC), also a crucial neural locus for the control of cognition and emotion, is not well known. The present study investigated the epigenetic regulation of two genes, reelin and brain-derived neurotrophic factor (bdnf), both play important roles in neural plasticity, in the mPFC. The data showed that the levels of total DNA methyltransferase (DNMTs), total histone acetyltransferases (HATs), global acetylated histone 3 (H3) and global acetylated histone 4 (H4) were all changed with the induction of long-term potentiation (LTP) in the mPFC, implying that DNA methylation and histone acetylation may involve in synaptic plasticity in the mPFC. The present results further demonstrated that the demethylation status of reelin and bdnf, and acetylated H3 and acetylated H4 at the reelin and the bdnf promoters in the mPFC were enhanced by the delivery of LTP-inducing high-frequency stimulation (HFS). Consistently, infusion of DNMT inhibitor, 5-azacytidine (5-azaC), or histone deacetylases (HDACs) inhibitor, sodium butyrate (NaB), into the mPFC could interfere with LTP-associated demethylation and acetylation of reelin and bdnf genes, and the induction of LTP as well. Long-term retention of trace fear memory, which is dependent on mPFC function, was also altered by administration of these inhibitors into the mPFC. These findings suggest that epigenetic regulation of DNA demethylation and histone acetylation of target genes, such as reelin and bdnf, might underlie the mechanisms of synaptic plasticity and memory retention in the mPFC.     

The visual field paradox: a theoretical account on the reafference principle providing a common frame for the homogeneity and inhomogeneity of visual representation

Observations on the structure of the visual field and its central representation lead to a paradox. A functional dissociation is indicated in oculomotor or attentional control when different response modes are observed as a function of stimulus eccentricity. Alternatively, constancy of brightness throughout the visual field suggests its homogeneity. This paradox can be resolved, if perceptual and motor processes are not conceived of being controlled by separate neuronal mechanisms, but are interconnected within one frame of reference. The reafference principle allows to formulate such a common frame as it integrates afferent and efferent processes. On the basis of this concept, the visual field paradox can be interpreted as not being a paradox at all, but a necessary condition for optimal information processing.     

电影观看过程中的字幕偏好性：声音的影响作用

字幕作为电影和电视节目的重要组成部分,在视频观看过程中起到辅助加工的作用。先前的研究认为字幕是视频语言的直接转译,字幕与声音信息具有很高的重叠性,所以关闭视频的声音不影响被试对字幕的加工。研究以电影视频作为刺激材料,采用眼动技术探讨了声音对电影观看过程中字幕偏好性的影响作用。实验通过控制视频的声音信息,探讨声音对字幕偏好性加工的影响作用。结果发现：视频的声音信息会对字幕的加工产生影响,关闭声音后被试对字幕的加工时间和次数会增加,无声条件下对字幕的注视次数和注视时间占总注视的比例超过了50%,说明声音和字幕对视频的理解具有相互辅助的作用。     

免费师范生教师职业认同量表的编制

鉴于免费师范生的特殊性,有必要对其教师职业认同进行科学研究。本研究在前期调研与访谈的基础上,对北京某高校284名免费师范生进行问卷测试,编制了《免费师范生教师职业认同量表》,并重新选取168名免费师范生施测,采用验证性因素分析技术对量表进行结构检验。研究结果表明：（1）免费师范生的教师职业认同感包括内在价值认同、外在价值认同、意志行为认同三个维度;（2）免费师范生教师职业认同量表具有良好的信、效度。