DETECTING INFLUENTIAL OBSERVATIONS IN SLICED INVERSE REGRESSION ANALYSIS

The detection of influential observations on the estimation of the dimension reduction subspace returned by Sliced Inverse Regression (SIR) is considered. Although there are many measures to detect influential observations in related methods such as multiple linear regression, there has been little development in this area with respect to dimension reduction. One particular influence measure for a version of SIR is examined and it is shown, via simulation and example, how this may be used to detect influential observations in practice.     

Comparative study of attitudes to religious groups in New Zealand reveals Muslim-specific prejudice

ABSTRACT

The March 15th terrorist attack started a national dialogue about prejudice in New Zealand. Previous research has investigated attitudes towards Muslims in comparison to ethnic minorities. However, presently, there are no nationally representative studies in New Zealand systematically comparing attitudes to Muslims with attitudes to other religious groups. Here, we present evidence from the New Zealand edition of the International Social Survey Programme module on religion, a national postal survey (N?=?1335) collected between September 2018 and February 2019. We assess perceived threat and negativity towards Christians, Muslims, Hindus, Buddhists, Jews, and Atheists. We find substantially greater perceived threat and negativity towards Muslims compared with other groups. In particular, older people, New Zealand Europeans, men, and those with more right-wing attitudes report greater threat and negativity towards Muslims. In line with previous studies, higher religious identification and higher education predict greater acceptance. Taken collectively, these results reveal that the Muslim Acceptance Gap in this country is substantial, and greater challenges for acceptance are evident among lower-educated, right-wing, older, secular, and male populations. The magnitude of this gap reveals a substantial challenge to the future of New Zealand where religious and secular people can live without evoking prejudice.     

The Hedonic and Eudaimonic Validity of the Orientations to Happiness Scale

The orientations to happiness scale (OTH) was designed to measure three routes to happiness: pleasure (hedonia), meaning (eudaimonia) and engagement (flow). Past research utilising the scale suggests that all orientations predict life satisfaction, with meaning and engagement the stronger predictors relative to pleasure. However, these findings are inconsistent with other research; one plausible explanation being that the OTH scale lacks validity. This was tested by having participants (N = 107) complete the OTH scale and the Satisfaction with Life scale, prior to completing an online diary reporting actual instances of hedonic and eudaimonic behaviour. Although meaning predicted eudaimonic behaviour, the pleasure orientation was unrelated to hedonic behaviour. Further, hedonic behaviour was more strongly related to life satisfaction than eudaimonic behaviour; inconsistent with OTH scale results. These findings challenge the validity of the OTH scale, and subsequently bring into question those conclusions drawn from past research utilising the OTH scale.     

An efficient computational approach for prior sensitivity analysis and cross‐validation

Prior sensitivity analysis and cross‐validation are important tools in Bayesian statistics. However, due to the computational expense of implementing existing methods, these techniques are rarely used. In this paper, the authors show how it is possible to use sequential Monte Carlo methods to create an efficient and automated algorithm to perform these tasks. They apply the algorithm to the computation of regularization path plots and to assess the sensitivity of the tuning parameter in g‐prior model selection. They then demonstrate the algorithm in a cross‐validation context and use it to select the shrinkage parameter in Bayesian regression. The Canadian Journal of Statistics 38:47–64; 2010 © 2010 Statistical Society of Canada     

Sponsor-Imposed Publication Restrictions Disclosed on ClinicalTrials.gov

We investigated whether sponsor-imposed publication restrictions for ClinicalTrials.gov trials were reasonable, based on consistency with Good Publication Practice 2 (GPP2). ClinicalTrials.gov trial record data were electronically imported (October 7, 2012) and screened for eligibility (phase 2–4, interventional, recruitment closed, results available, first received for registration after November 10, 2009, any sponsor type, investigators not sponsor employees). Two authors categorized restrictions information as consistent or not consistent with GPP2, resolving discrepancies by consensus. Of the eligible trials (388/484, n = 81,768 participants), 80.7% (313/388) had restrictions disclosed, and 92.5% (311/388) were industry-sponsored. Significantly more trials had restrictions that were consistent with GPP2 than not (74.1% [232/313], n = 55,280 participants vs. 25.9% [81/313], n = 19,677 participants; P < .001). Reasons for inconsistency were insufficient, unclear, or ambiguous information (48.1%, 39/81), sponsor-required approval for publication (35.8%, 29/81), sponsor-required text changes (8.6%, 7/81), and outright bans (7.4%, 6/81). Follow-up of trials with insufficient information and a contact email (response rate, 46.9% [15/32]) revealed 2 additional bans. A total of 776 participants had consented to trials that had publication bans. Many, but not all, sponsor-imposed publication restrictions disclosed on ClinicalTrials.gov may be considered reasonable. Sponsors should ensure restrictions are appropriately disclosed. Volunteers should be alerted to any restrictions before consenting to participate in a clinical trial.     

Using Critical Realism to Explain Indeterminacy in Role Behaviour Systematically

We demonstrate in this article how critical realism can be used to explain indeterminacy in role behaviour systematically. In so doing, we both rebut various criticisms of critical realism made recently by Kemp and Holmwood and attempt to illustrate the weaknesses and absences of approaches that concentrate unduly on the collection of expectations of (different groups of) actors concerning roles and the behaviour of incumbents. Within a framework that recognises that structure and agency are ontologically distinct but necessarily empirically related entities, we argue that structures should be seen as sources of indeterminacy within role behaviour for at least four reasons: the co‐determination of roles through the intersection of structures; conflicting role expectations caused by contradictions inhering within structures; asymmetries of power within social relations; and asymmetric repetition within structural reproduction/transformation. In light of this discussion of structural sources of indeterminacy, we then go on to demonstrate how critical realism is also able to analyse systematically the agential sources of indeterminacy within role behaviour and expectations through theories of psychobiography and reflexivity. We thus conclude that critical realism contains the conceptual tools required to illuminate the point(s) of intersection between structure, culture and agency which is central to understanding both role behaviour and the plurality of expectations concerning such behaviour.     

A Retrospective Analysis of Employment Duration: Evidence from the Second Half of the Twentieth Century

Popular perception holds that average employment durations have declined in recent decades. However, most studies conclude that the proportion of long‐term employment relationships has remained remarkably stable over time. To shed light on this discrepancy we use distribution analysis to systematically track changes in Canadian employment durations over the second half of the 20th century. The analysis reveals that earlier cohorts were more likely to have longer employment durations than later cohorts and that there are shifts in proportions between longer and shorter work episodes with employment durations declining sharply for men and mixed results for women.     

Young people and social networking sites: exploring the views and training opportunities of CAMHS social workers in Ireland

ABSTRACT

Social Networking Sites (SNS) (e.g. Facebook, Instagram) have become a fundamental part of the daily lives of many young people. SNS engagement has been associated with a number of risks and benefits, some of which are particularly relevant to young people who access child and adolescent mental health services (CAMHS). Consequently, understanding how and why young people engage with SNS, and the associated risks and benefits, may become an increasingly important part of CAMHS social work.

This small-scale study (n = 15) utilised an online survey to explore the importance that a sample of Irish CAMHS social workers attribute to maintaining an awareness of how young people use SNS, whether they, in their professional lives, have been offered the opportunity to learn about SNS engagement among young people, and whether they have taken it upon themselves to learn about this topic.

Findings suggest that participants consider an understanding of SNS to be an important part of CAMHS practice. However, participants report that they do not feel sufficiently aware of SNS trends among young people, suggesting that there is scope for SNS-focused training/learning opportunities among this sample of CAMHS social workers. Implications for practice and suggestions for future research are outlined.     

Contemporary Research on Social Movements and Protest in Latin America: Promoting Democracy, Resisting Neoliberalism, and Many Themes in between

This essay outlines how research on Latin American social movements has evolved since the late 1980s. Emphasis is given to two topics. First, the essay examines how Latin American social movement research has historically been oriented toward social movement theories that emerged out of the study of European movements and, to a lesser extent, movements in the United States. At the same time, it discusses how the unique historical and contextual factors of Latin American societies have repeatedly been found to defy adequate explanation by these theories. Second, the essay outlines five major themes that characterize the Latin American social movement literature: the dynamics of movements in relation to transitions to democracy, and to neo-liberal economic reforms, as well as transnational movement dynamics, indigenous movements, and women's movements.