Joint Contributions of Peer Acceptance and Peer Academic Reputation to Achievement in Academically At Risk Children: Mediating Processes

The longitudinal relationships between two dimensions of peer relationships and subsequent academic adjustment were investigated in a sample of 543 relatively low achieving children (M = 6.57 years at Year 1, 1(st) grade). Latent variable SEM was used to test a four stage model positing indirect effects of peer acceptance and peer academic reputation (PAR) assessed in Year 2 on academic achievement in Year 5, via the effects of the peer relationships variables on perceived academic competence in Year 3 and effortful engagement in Year 4. As expected, the effect of PAR on engagement was partially mediated by perceived academic competence, and the effect of perceived academic competence on achievement was partially mediated by engagement. In the context of PAR, peer acceptance did not contribute to the mediating variables or to achievement. Findings provide a clearer understanding of the processes by which early peer-relationships influence concurrent and future school-related outcomes. Implications for educational practice and future research are discussed.     

Quality of Life of Individuals with Acquired Brain Injuries

This study investigated the quality of life of individuals with acquired brain injuries (ABI) across a one- to fifteen-year post-injury time span. This allows us to identify the health and service needs of individuals with ABI and provide direction for further improvement. Twenty-nine individuals were invited from the local Self-Help Group for the Brain-Damaged to participate in this study. Four instruments were used to help in the investigation of the subjective components of the quality of life, including the Personal Wellbeing Index (PWI) and Positive and Negative Affect Scales (PANAS). The instruments used were the Modified Barthel Index (MBI) and Lawton Instrumental Activity of Daily Living (IADL) Scale. After analysis of the results and their interpretation, there was no significant difference between the post-injury groups in their scores of negative affect. It is suggested that there should be services, such as psychotherapy, to help reduce the existence of negative moods. Improvement in the IADL aspect should be more focused in future rehabilitation services to allow people to enjoy a fuller life.     

Influence of Student-Teacher and Parent-Teacher Relationships on Lower Achieving Readers' Engagement and Achievement in the Primary Grades

Participants were 443 (52.6% male, 47.4% female) ethnically diverse, 1st-grade, lower achieving readers attending 1 of 3 school districts in Texas. Using latent variable structural equation modeling, the authors tested a theoretical model positing that (a) the quality of teachers' relationships with students and their parents mediates the associations between children's background characteristics and teacher-rated classroom engagement and that (b) child classroom engagement, in turn, mediates the associations between student-teacher and parent-teacher relatedness and child achievement the following year. The hypothesized model provided a good fit to the data. African American children and their parents, relative to Hispanic and Caucasian children and their parents, had less supportive relationships with teachers. These differences in relatedness may be implicated in African American children's lower achievement trajectories in the early grades. Implications of these findings for teacher preparation are discussed.     

Justice for all? Progress in Research on Cultural Variation in the Psychology of Distributive and Procedural Justice

Nous passons en revue les apports des recherches concernant l'impact de la culture sur la perception de la justice. Nous pre´sentons les mode`les qui rendent compte de la faµon dont les gens appre´cient l'e´quite´ de l'attribution des allocations d'une part, l'e´quite´ des processus de de´cision d'autre part. Suite a` l'examen de recherches interculturelles, nous prenons en conside´ration des diffe´rences entre pays pour mettre a` l'e´preuve des hypothe`ses sur les liens entre des valeurs culturelles ge´ne´rales (ex.: individualisme‐collectivisme) et des crite`res particuliers (ex. les re`gles d'e´quite´). Nous ne manquons pas toutefois de souligner les e´cueils que rencontre cette strate´gie de recherche qui a entraîne´ une meilleure pre´cision des conceptions de l'influence culturelle (pre´cision dans les valeurs, les contextes sociaux qui renvoient a` des crite`res d'e´quite´ particuliers et les structures de savoirs qui pre´sident a` l'interpre´tation des conduites)     

沉没成本效应中的心理学问题

沉没成本效应是一种常见的非理性行为。本文从心理学角度对其进行了系统地介绍。文章概括了沉没成本及沉没成本效应的定义,沉没成本的种类和发生领域,并用心理学理论对沉没成本效应进行了解释。此外．文章还讨论了沉没成本的逆效应以及影响沉没成本效应的主要因素。     

The Impacts of Ignoring a Crossed Factor in Analyzing Cross-Classified Data

Cross-classified random-effects models (CCREMs) are used for modeling nonhierarchical multilevel data. Misspecifying CCREMs as hierarchical linear models (i.e., treating the cross-classified data as strictly hierarchical by ignoring one of the crossed factors) causes biases in the variance component estimates, which in turn, results in biased estimation in the standard errors of the regression coefficients. Analytical studies were conducted to provide closed-form expressions for the biases. With balanced design data structure, ignoring a crossed factor causes overestimation of the variance components of adjacent levels and underestimation of the variance component of the remaining crossed factor. Moreover, ignoring a crossed factor at the kth level causes underestimation of the standard error of the regression coefficient of the predictor associated with the ignored factor and overestimation of the standard error of the regression coefficient of the predictor at the (k?1)th level. Simulation studies were also conducted to examine the effect of different structures of cross-classification on the biases. In general, the direction and magnitude of the biases depend on the level of the ignored crossed factor, the level with which the predictor is associated at, the magnitude of the variance component of the ignored crossed factor, the variance components of the predictors, the sample sizes, and the structure of cross-classification. The results were further illustrated using the Early Childhood Longitudinal Study-Kindergarten Cohort data.     

风险决策与博彩行为的眼动特点

为了探索博彩行为与风险决策的特点,采用眼动研究方法对博彩行为中的风险决策任务进行了实验,结果发现:(1)外部框架表征虽影响决策者的内部表征,但决策者的内部表征方式表现出稳定的规律;(2)参与者在博彩中面对损失时,认知加工的决策时间比在面对收益的博彩任务的决策时间长,凝视次数也多比较多,决策者的瞳孔直径比面对收益任务下更大;(3)博彩参与者的内部表征方式,随博彩任务的外部表征的框架,金额、概率、备择项间倍数的改变而发生变化.结论:概率信息是博彩任务中的决策者稳定的决策权重;决策者在面对损失时会更加敏感,导致在决策过程中给予更多的加工负荷;博彩任务的外部表征对参与者内部表征有显著影响.     

《人体器官移植条例》颁布后面临的问题与对策

《人体器官移植条例》规范引导着我国器官移植健康发展,然而,随着《条例》对器官移植供、受者条件的严格限制,尸体供器官数量迅速下降,亲属活体移植逐步占据主导地位,由此引发一系列问题。结合《条例》,就器官来源短缺、保障活体供者安全、亲属活体供者选择和器官移植伦理委员会作用等问题做出较详细的分析,提出解决方法和对策。