Decision-making for paired comparison using the extended amended Davidson model

For decision purpose, one of the commonly used statistical applications is the comparison of two or more objects or characteristics. Sometimes, it is not possible to compare the objects at a time or when the number of objects under study is large and the differences between the objects become small, then a useful way is to compare them in pairwise manner. Because of its practical nature, the fields in which paired comparison techniques are being used are numerous. Many Bayesian statisticians have focused their attention on the practical and usable paired comparison technique and have successfully performed the Bayesian study of many of the paired comparison models. In the current study, analysis of the amended Davidson model (ADM) which has been extended after incorporating the order effect parameter is narrated. For this intention, both the informative and non informative priors are used. The said model is studied for the case of four treatments which are compared pairwise.     

Comparison of the finite mixture of ARMA-GARCH,back propagation neural networks and support-vector machines in forecasting financial returns

The use of GARCH type models and computational-intelligence-based techniques for forecasting financial time series has been proved extremely successful in recent times. In this article, we apply the finite mixture of ARMA-GARCH model instead of AR or ARMA models to compare with the standard BP and SVM in forecasting financial time series (daily stock market index returns and exchange rate returns). We do not apply the pure GARCH model as the finite mixture of the ARMA-GARCH model outperforms the pure GARCH model. These models are evaluated on five performance metrics or criteria. Our experiment shows that the SVM model outperforms both the finite mixture of ARMA-GARCH and BP models in deviation performance criteria. In direction performance criteria, the finite mixture of ARMA-GARCH model performs better. The memory property of these forecasting techniques is also examined using the behavior of forecasted values vis-à-vis the original values. Only the SVM model shows long memory property in forecasting financial returns.     

When the victim becomes vicious: Combined effects of pseudo transformational leadership and epistemic motivation on contempt and deviant behaviors

Utilizing affective events theory (Weiss & Cropanzano, 1996), the current study unravels how and when pseudo-transformational leaders promote contempt, avoidance, and aggression. Specifically, we examined whether pseudo-transformational leadership enforces feelings of contempt, which, in turn, fosters interaction avoidance and covert aggression in followers. We hypothesized that contempt also has an indirect effect that is contingent on levels of epistemic motivation of followers. By adopting a multi-wave research design, we gathered data from 277 employees of the service sector of Pakistan. The results signified that followers of pseudo-transformational leaders feel contemptuous of them and respond with interaction avoidance and indirect aggression. Further, we found that the impact of pseudo-transformational leadership on contempt was more pronounced in individuals with higher levels of epistemic motivation. We believe that this study opens up a new avenue in the pseudo-transformational leadership literature by highlighting the mechanism and conditions under which such leaders are deleterious for organizations.     

The American Islamic Community: Which Muslims are Likely to be Encouraged by Other People?

ABSTRACT

Encouragement—or expressions of support designed to instill perseverance and hope in the face of challenging circumstances—is an important concept in the strengths perspective and a central feature of social work practice. Encouragement may be a particularly significant factor for Muslims living in post-9/11 America. Yet, little research has examined this topic despite its relevance. To address this gap in the literature, this cross-sectional study employed a community sample of Muslims (N = 274) to identify which Muslims are disproportionately likely to report receiving expressions of support from other people. The results of the logistic regression indicated that Muslims who were single, Middle Eastern, non-Sunni, and frequent Mosque attenders, were more likely to receive expressions of support compared to those who were married, European American, Sunni, and less frequent Mosque attenders. Conversely, Muslims without a 4-year college education and born aboard were less likely to receive expressions of support compared to those with a graduate degree and born in the US. The paper concludes by offering a tentative explanation for the results and suggesting some implications for practice with Muslim clients. Future researchers might build upon the findings by replicating the study with nationally representative samples.     

Bayesian analysis of the amended Davidson model for paired comparison using noninformative and informative priors

In recent years, numerous statisticians have focused their attention on the Bayesian analysis of different paired comparison models. While studying paired comparison techniques, the Davidson model is considered to be one of the famous paired comparison models in the available literature. In this article, we have introduced an amendment in the Davidson model which has been commenced to accommodate the option of not distinguishing the effects of two treatments when they are compared pairwise. Having made this amendment, the Bayesian analysis of the Amended Davidson model is performed using the noninformative (uniform and Jeffreys’) and informative (Dirichlet–gamma–gamma) priors. To study the model and to perform the Bayesian analysis with the help of an example, we have obtained the joint and marginal posterior distributions of the parameters, their posterior estimates, graphical presentations of the marginal densities, preference and predictive probabilities and the posterior probabilities to compare the treatment parameters.     

Self-reported mental health problems and post-traumatic growth among children in Pakistan care homes

ABSTRACT

Children in care experience multiple risk factors, particularly in low-income countries such as Pakistan. The aim was to establish rates of mental health problems and their relationship with posttraumatic growth, as reported by 132 children aged 9–19 years, living in three care homes in Pakistan. Children reported high rates of posttraumatic stress (70.45%) and common mental health symptoms (43.94%) within the clinical range, but also high levels of posttraumatic growth. These findings highlight the high levels of mental health needs among children in residential care, as well as the importance of understanding factors that promote their posttraumatic growth and resilience.     

Analysis of the amended Davidson model with order effect for paired comparison in the Bayesian paradigm

We commonly observe many types of paired nature of competitions in which the objects are compared by the respondents pairwise in a subjective manner. The Bayesian statistics, contrary to the classical statistics, presents a generic tool to incorporate new experimental evidence and update the existing information. These and other properties have ushered the statisticians to focus their attention on the Bayesian analysis of different paired comparison models. The present article focuses on the amended Davidson model for paired comparison in which an amendment has been introduced that accommodates the option of not distinguishing the effects of two treatments when they are compared pairwise. However, Bayesian analysis of the amended Davidson model is performed using the noninformative priors after making another small modification of incorporating the parameter of order effect factor. The joint and marginal posterior distributions of the parameters, their posterior estimates, predictive and posterior probabilities to compare the treatment parameters are obtained.     

Understanding the lived experience of bullying in Australian workplaces: An interpretative phenomenological analysis

The purpose of this article is to develop a deeper understanding of a negative behavior at work through a study of the lived experience of bullying in Australian workplaces. Although there is considerable research available on workplace bullying, extant research largely provides empirical examinations of the prevalence, causes, and consequences of the phenomenon. By contrast, the research herein reported offers an in-depth account of bullying from the frame of reference of those who have experienced it and demonstrates the difficulties faced by them when coping with it. The study’s data source is drawn from reports submitted to the Australian Parliamentary Inquiry on workplace bullying. The reports were analyzed by using the principles of interpretative phenomenological analysis. The study highlights the impact of bullying at work on individuals’ lives and the coping mechanisms used for dealing with the impact. This article also reveals that bullying destroys organizations’ succession planning efforts as competent and talented individuals leave jobs as a way of coping with bullying. The study further shows that some individuals eventually choose to end their lives as a way of coping with bullying. The article thus adds evidence to anecdotal suggestions of the link between bullying and suicide in Australia.     

Religious Microaggressions: A Case Study of Muslim Americans

ABSTRACT

The increasing population of Muslims in America faces challenges not uncommon to other faith and immigrant communities. One particular challenge is Muslim experiences of various forms of discrimination, prejudice, anti-Muslim bigotry, and microaggressions, especially in post-9/11 America. While microaggressions have been discussed in the social sciences literature, religious microaggressions have not been clearly addressed in the social work literature. This article aims to fill this gap in the literature by examining the connections among racial microaggressions, the racialization of religion, and ultimately religious microaggressions. The article concludes by presenting implications for social work policy, practice, and education in the area of religious microaggressions.     

Can ethical leadership inhibit workplace bullying across East and West: Exploring cross-cultural interactional justice as a mediating mechanism

While workplace bullying is recognised as a serious issue for management concern around the world, the literature on approaches to prevent and manage it in international settings is sparse. This paper advances knowledge on managing workplace bullying by reporting an investigation of how and why ethical leadership may be an effective management style to address this issue across cultures. It draws on Social Learning and Social Exchange Theories to conceptualise interactional justice as a possible mediating mechanism by which workplace bullying can be reduced in the presence of ethical leadership.The researcher surveyed 636 employees working in an equivalent job context in Australia (N = 306) and Pakistan (N = 330) to determine the cross-cultural effectiveness of ethical leadership-based framing. Through the examination of direct and indirect effects (via interactional justice) of ethical leadership on workplace bullying, the findings indicated that employee exposure to such behaviour is significantly reduced because ethical leaders foster justice at work. This study has implications for improving international management practice in regard to workplace bullying.