Intergroup Behaviour and Ethnicity: A Social Psychological Perspective

Humans exist not only as unique individuals, but also as members of social groups that are formed on the basis of ethnicity, gender, age and so forth. Reflecting this duality are interpersonal and intergroup modes of behaviour, respectively. Thus, humans can act in terms of their personal self and treat others as individuals (interpersonal behaviour); they can also act in terms of group membership and relate to others as members of this or that group (intergroup behaviour). In a mixed marriage, for example, the couple's behaviour toward each other is ‘normally’ interpersonal, but can become intergroup when war breaks out between their respective ethnic groups. Contrary to common sense, factors more minimal than a war are often sufficient to trigger intergroup behaviour. Indeed, seemingly interpersonal encounters are in fact intergroup. How does behaviour shift from interpersonal to intergroup, and with what consequences? To address these questions, I outline a social psychological perspective based on social identity theory and conclude with a discussion on the enigmas of ethnicity.     

大学生职业决策困难判别与预报的实证分析

近年来,职业决策困难受到了越来越多的关注。应用心理测量和数学建模的方法,采集了525份有效数据,对大学生职业决策困难的判别和预报进行元分析。研究结果表明,有37.3%的大学生存在职业决策困难,专业认同、职业定向、职业意识、任职条件、职业前景、教育经历等6个因子对大学生职业决策困难的判别有效,预报正确率超过80%。从就业主体和职业决策困难的预报特征来看,大学生对职业发展前景和教育经历产生困惑导致的心理失衡性失业,可能远远超过目前较为普遍认为的专业设置导致的结构性失业。     

Characterizations of the poisson process using,the variance

Let γ(t) be the residual life at time t of the renewal process {A(t), t > 0}, which has F as the common distribution function of the inter-arrival times. In this article we prove that if Var(γ(t)) is constant, then F will be exponentially or geometrically distributed under the assumption F is continuous or discrete respectively. An application and a related example also are given.     

Language, Power, and Intergroup Relations

Language is a communication medium for turning a power base into influence. But more than that, the creation of power and its maintenance or change can also occur in and through language. In the present article, we discuss some of the dynamic links between language and power to underscore their relevance to the study of intergroup relations. In particular we address the means by which low-power groups might achieve power, and how those who are in high-power positions might retain and subvert acts of power. In doing this, we counterpose our discussion with research that addresses these same issues from a static and individualistic approach to power. Our central argument is that the latter work lacks theoretical facility for describing and understanding the aforementioned dynamic processes of power, and moreover, that its application may unwittingly serve to reify and cement existing control relationships.     

Semi-parametric hybrid empirical likelihood inference for two-sample comparison with censored data

Two-sample comparison problems are often encountered in practical projects and have widely been studied in literature. Owing to practical demands, the research for this topic under special settings such as a semiparametric framework have also attracted great attentions. Zhou and Liang (Biometrika 92:271–282, 2005) proposed an empirical likelihood-based semi-parametric inference for the comparison of treatment effects in a two-sample problem with censored data. However, their approach is actually a pseudo-empirical likelihood and the method may not be fully efficient. In this study, we develop a new empirical likelihood-based inference under more general framework by using the hazard formulation of censored data for two sample semi-parametric hybrid models. We demonstrate that our empirical likelihood statistic converges to a standard chi-squared distribution under the null hypothesis. We further illustrate the use of the proposed test by testing the ROC curve with censored data, among others. Numerical performance of the proposed method is also examined.     

Deprivation and Poverty in Hong Kong

Despite high and rising real incomes, the poverty rate in Hong Kong remains a cause of community concern. The government has been reluctant to set a poverty line, although the recently (re‐)established Commission on Poverty has recommended that a poverty line for Hong Kong is developed. Against this background, this article reports results derived from a new deprivation study designed to shed new light on the living standards of the poorest in the community. Reflecting international studies, deprivation is identified as existing when people do not have and cannot afford items regarded by a majority in the community as being essential for all. A list of 35 basic needs items is identified as meeting this definition, the results indicating that around 30 per cent are deprived of at least two items, over 18 per cent are deprived of at least four items and 10 per cent are deprived of at least eight items. Deprivation rates are particularly high among items that meet basic health needs. A mean deprivation score index (MDIS) is then used to compare the degree of deprivation experienced by different groups, and indicates that deprivation is most pronounced amongst those receiving Comprehensive Social Security Assistance (CSSA), people affected by a disability and recent migrants. The overlap between deprivation and income poverty is also relatively low, which suggests both measures have a role to play in identifying who is most vulnerable and guiding where policy change is most urgently needed.     

Challenges of social workers' involvement in the recovery of the 5.12 Wenchuan Earthquake in China

This article explores the challenges of social workers' involvement in recovery work of the 5.12 Wenchuan Earthquake (12 May 2008). Six social workers working in three social work stations in Sichuan, China, were asked to report the challenges they faced in working with disaster survivors. Findings reveal that the social workers faced many challenges. These include lack of government support, low professional status of social work, rapid changes in the social environment in disaster‐affected areas, lack of supervision, lack of cooperation and coordination among social service agencies, and lack of experience and knowledge in working with disaster survivors. The practical, educational and policy implications of the findings are addressed.     

Marginal semiparametric multivariate accelerated failure time model with generalized estimating equations

The semiparametric accelerated failure time (AFT) model is not as widely used as the Cox relative risk model due to computational difficulties. Recent developments in least squares estimation and induced smoothing estimating equations for censored data provide promising tools to make the AFT models more attractive in practice. For multivariate AFT models, we propose a generalized estimating equations (GEE) approach, extending the GEE to censored data. The consistency of the regression coefficient estimator is robust to misspecification of working covariance, and the efficiency is higher when the working covariance structure is closer to the truth. The marginal error distributions and regression coefficients are allowed to be unique for each margin or partially shared across margins as needed. The initial estimator is a rank-based estimator with Gehan’s weight, but obtained from an induced smoothing approach with computational ease. The resulting estimator is consistent and asymptotically normal, with variance estimated through a multiplier resampling method. In a large scale simulation study, our estimator was up to three times as efficient as the estimateor that ignores the within-cluster dependence, especially when the within-cluster dependence was strong. The methods were applied to the bivariate failure times data from a diabetic retinopathy study.     

杜诗自注与诗歌境域的开拓

杜甫诗歌的自注作为中国诗歌自注体的早期代表,记录下了与诗歌创作相关的丰富信息,充分发挥了诗歌自注体的辅助功能,诗与注的紧密互动对杜甫诗歌的情志表现产生了一定的积极影响。杜甫再次介入诗歌进行自我诠释的动机反映了诗人对创作的自省心理,流露出其多方开拓新境的诗学追求。