Centering predictor variables in cross-sectional multilevel models: a new look at an old issue

Appropriately centering Level 1 predictors is vital to the interpretation of intercept and slope parameters in multilevel models (MLMs). The issue of centering has been discussed in the literature, but it is still widely misunderstood. The purpose of this article is to provide a detailed overview of grand mean centering and group mean centering in the context of 2-level MLMs. The authors begin with a basic overview of centering and explore the differences between grand and group mean centering in the context of some prototypical research questions. Empirical analyses of artificial data sets are used to illustrate key points throughout. The article provides a number of practical recommendations designed to facilitate centering decisions in MLM applications.     

Covariances between regression coefficient estimates in a single mediator model

This study presents formulae for the covariances between parameter estimates in a single mediator model. These covariances are necessary to build confidence intervals (CI) for effect size measures in mediation studies. We first analytically derived the covariances between the parameter estimates in a single mediator model. Using the derived covariances, we computed the multivariate‐delta standard errors, and built the 95% CIs for the effect size measures. A simulation study evaluated the accuracy of the standard errors as well as the Type I error, power, and coverage of the CIs using various parameter values and sample sizes. Finally, we presented a numerical example and a SAS MACRO that calculates the CIs for the effect size measures.     

Predictors of quality of life of Portuguese Americans: identity,acculturation, and religiosity

ABSTRACT

Utilising the Multicultural Assessment-Intervention Process (MAIP) framework, the present study examined the effects of acculturation, ethnic identity, and religiosity on Portuguese Americans’ perceptions of their quality of life. Several culturally-sensitive variables were used to predict quality of life attitudes among a convenience sample of 305 Portuguese American adults. A structural model with quality of life as the outcome variable, Portuguese identity as the predictor, and Anglo orientation and religious faith as separate mediators was tested and a simple mediation structure involving religious faith was confirmed. While Portuguese identity predicts quality of life directly, when religious faith was added into the model as a mediator, much of the predictive value of Portuguese identity on quality of life was funnelled through religious faith. Implications for future Portuguese American research were discussed.     

Changing physical appearance preferences in the United Arab Emirates

Rapid economic growth in the United Arab Emirates (UAE) has impacted traditional ways of life rooted in Bedouin traditions and Islamic values. Research undertaken within the UAE suggests that a thin body-image ideal is widespread, as are abnormal eating attitudes and extreme dietary behaviours. However, this regional research has been exclusively cross-sectional, precluding conclusions about the temporal dynamics or nascence of these phenomena. This study explores changes in physical appearance preferences in the UAE over the past two decades. Interviews were undertaken with five khatabaat (marriage brokers), who were asked to report the attributes typically requested by those seeking wives, both now, and in the past. Thematic analysis of these data highlighted differences between the attributes currently deemed desirable, and those deemed desirable in the recent past. These findings are discussed in the context of the nation's rapid socio-economic change, and their implications for body-image and eating-related problems.     

Sanitary Worker’s Death Unnerves Pakistan’s Health Care Ethics to the Core

Health care ethics is a sensitive domain, which if ignored, can lead to patient dissatisfaction, weakened doctor–patient interaction and episodes of violence. Little importance has been paid to medical ethics within undergraduate medical education in developing countries such as Pakistan. Three doctors in Pakistan are currently facing an official police complaint and arrest charges, following the death of a sanitary worker, who fell unconscious while cleaning a drain and was allegedly refused treatment as he was covered in sewage filth. The medical license of the doctors in question should be cancelled, if found guilty following a thorough investigation into the case. The ‘right to life’ has been universally assured by all moral, cultural and legal codes and no society can ever argue against the sacredness of a human life. It is quite clear that the aforesaid doctors’ actions are not only against the core principles of the physicians’ code, but also go against the doctrine of human rights. If serious efforts on an urgent basis are not made by the regulatory and governing bodies, one can definitely expect similar incidents for at least a few more decades before any noticeable change is seen.     

The role of target salience in crowding

We studied 'crowding' in the parafovea using orientation identification of a Gabor target as the task, and flanking Gabors on an isoeccentric circle as distractors. Orientation-discrimination thresholds were raised by nearby flanking distractors. This crowding effect was increased by the number of distractors and decreased by the spatial separation between target and distractors. Crowding was greatest when the target was in the centre of the distractor array and smallest when the target was on the edge of the array. A cue indicating the position of the target improved performance when the position was otherwise unknown and the spatial separation between target and distractors was large, but the cue had no significant effect when separation was small. Increasing the contrast of the target relative to the distractors reduced crowding, but targets of smaller contrast than that of the distractors are even harder to identify than those of the same contrast. Putting the target and distractors in different depth planes decreased crowding for some observers, but there were qualitative individual differences. A large (say, 45 degrees) difference in orientation between target and distractors caused the target to 'pop out' in a presence/absence task, despite the evidence from other studies that crowding is still found in these conditions. We conclude that salience has, at best, modest effects on crowding.     

Striving for God's Attention: Gendered Spaces and Piety

This article looks at the inadequacy of space available to women in the two most holy sites for all Muslims: Masjid al‐Haram in Makkah and Masjid an‐Nabawi in Madinah, Saudi Arabia. I argue that religious discourse, shaped by geopolitical factors, has framed piety for women primarily in terms of modesty, such that a woman is often considered a good Muslim if she is visible only within her female community but invisible to the larger society. Furthermore, I argue that the allocation of meager space affects not only the perception of women's religious standing in society, but also women's own perception about their moral selves. The article claims that by being relegated to small sections within religious spaces, women's collective worship is evident neither to the community at large nor can it be fully experienced by individual women, thus placing obstacles in women's path to seek to closeness to God.     

Lens on International Clinical Supervision: Lessons Learned from a Cross-National Comparison of Supervision

Journal of Contemporary Psychotherapy - Clinical supervision is an essential mechanism for training psychologists internationally. But although it is performed globally, scholarship has primarily...     

Spiritual Transcendence and Psychological Adjustment: The Moderating Role of Personality in Burn Patients

The current study examined the moderating role of personality traits (neuroticism and extraversion) on the relationship between spiritual transcendence and positive change, and spiritual transcendence and distress in burn patients. The sample (N = 98) comprised adult burn patients (age = 25–50) admitted to three hospitals in Lahore, Pakistan. They were assessed according to a demographic information sheet, the NEO Personality Inventory (McCrae and Costa in J Personal Soc Psychol 52:81–90, 1987), the Spiritual Transcendence Index (Seidlitz et al. in J Sci Study Relig 41:439–453, 2002), the Depression, Anxiety, Stress Scales-21 (Lovibond and Lovibond in Manual for the Depression Anxiety Stress scales, Psychology Foundation, Sydney, 1995), and the Perceived Benefit Scales (McMillen and Fisher in Soc Work Res 22(3):173–186, 1998). Stepwise moderated regression analysis showed that both personality traits (neuroticism and extraversion) played a moderating role in the relationship between spiritual transcendence and positive change, and spiritual transcendence and distress in burn patients. The findings highlight the potential role spiritual transcendence may have in understanding and improving the psychological adjustment of burn patients.