The Effects of Misconceptions on the Properties of Friedman's Test

Friedman's test is a widely used rank-based alternative to the analysis of variance (ANOVA) F-test for identifying treatment differences in a randomized complete block design. Many texts provide incomplete or misleading information about when Friedman's test may be appropriately applied. We discuss the assumptions needed for the test and common misconceptions. We show via simulation that when the variance or skew of the treatment distributions differ, application of Friedman's test to detect differences in treatment location can result in Type I error probabilities larger than the nominal α, and even when α is unaffected, the power of the test can be less than expected.     

Stratified structural and epistemic aspects of the care manager's discretion—a theoretical approach to social work related to older people's potential relocation to a residential home

By applying a theoretical point of departure, the overarching aim of this article is to describe, analyze, and try to understand why care managers in their everyday occupational practice normalize the restrictive approach when older people consider relocation to a residential home. While earlier research to a large extent has drawn attention to how the care managers carry out the restrictive approach, this article pays attention to the circumstances paving its way. The focus is on influences from different sociological levels, thereby ‘stratified’, and from two aspects of discretion, where ‘structural aspects’ refer to choices between permitted alternatives and ‘epistemic aspects’ to practical reasoning under conditions of indeterminacy. With this combination, a multitude of circumstances contributing to the restrictive approach is revealed. Thus, the theoretical model includes levels as well as discretionary powers where formulas constitute the foundation at each level, subsequently related to multidisciplinary references in order to get the practice into perspective. The findings show that the priority given to home-based care in contrast to residential care is repeated and confirmed at each level and besides in an interchange between structural and epistemic aspects.     

Motives and Decisions for and Against Having Children Among Nonheterosexuals and the Impact of Experiences of Discrimination,Internalized Stigma,and Social Acceptance

Same-sex parents are increasingly a topic of public discourse. A growing number of homosexuals openly speak about their desire to have children or are already living together in different family constellations. The current study examined the decisions for or against having children and the motivations behind those decisions among nonheterosexuals living in Germany. A sample of 1,283 nonheterosexuals participated by means of an online survey. As some nonheterosexual individuals do not identify themselves with a male or female gender identity, a third category, “gender different,” was generated. Motives for (not) having children, perceptions of social acceptance, experiences of discrimination in relation to one's sexual orientation, and levels of internalized stigma were taken into account regarding their influence on the decision about parenthood. Most respondents (80%) reported that they did not have children. However, among this group, 43% stated that they had decided to have children later in their lives, 24% were undecided, and 11% had already decided against having children. The most important influences on the decision of whether to have children were respondents’ age and their desire for emotional stabilization. Negative experiences as a result of sexual orientation and internalized stigma had no impact on the decisions regarding parenthood.     

Emotional intelligence and leadership emergence in small groups

We report the findings from two studies that examine the association between emotional intelligence and leadership emergence in small groups. In both studies, members of groups completed measures of emotional intelligence and other individual differences prior to working on a group project. Their peers rated their leadership emergence at the conclusion of the project. Overall emotional intelligence and a number of its dimensions were associated with leadership emergence over and above cognitive intelligence, personality traits, and gender. These findings were observed when emotional intelligence was measured with an ability test but not when it was measured with a self-report scale. Among the dimensions of emotional intelligence, the ability to understand emotions was most consistently associated with leadership emergence.     

Leadership Styles as Predictors of Self‐reported and Observed Workplace Bullying

The connection between leadership or management style, on the one hand, and perceptions of bullying, on the other, has received little attention within bullying research. Hence, the aim of this study is to examine the relationship between subordinates' ratings of their immediate superiors' behaviours, and both perceived exposure and claims of observations of bullying at work. Based on a sampling process which emphasized randomness and representativeness, the responses from 5288 respondents in Great Britain taking part in a nationwide study on psychosocial issues at work were included in the analysis. Bullying correlated with all four leadership styles measured. Yet, ‘non‐contingent punishment’ emerged as the strongest predictor of self‐perceived exposure to bullying, while autocratic leadership was the strongest predictor of observed bullying. Hence, while observers particularly associate bullying with autocratic or tyrannical leader behaviour, targets relate bullying more to non‐contingent punishment, i.e. an unpredictable style of leadership, where punishment is meted out or delivered on leaders' own terms, independent of the behaviour of subordinates. In addition, laissez‐faire leadership emerged as a predictor of self‐reported as well as observed bullying. Thus, leadership styles seem to play an important but complex role in the bullying process.     

Workplace bullying as predicted by non-prototypicality,group identification and norms: a self-categorisation perspective

ABSTRACT

Research and theory on deviance in work groups suggest that non-prototypical members risk devaluation and mistreatment by their peers. Drawing on the self-categorisation theory, we propose and test a contextual model to explain workplace bullying from a target perspective, using non-prototypicality as a predictor and social identification and anti-bullying norms at the work group level as two- and three-way cross-level moderators. Multilevel modelling and a sample of employees from the university sector in the Low Lands (n?=?572) was employed. In line with our first hypothesis, we found that risk of exposure to workplace bullying is particularly high for non-prototypical work group members. We also hypothesised that work group social identification would facilitate bullying of non-prototypical members, while anti-bullying norms would buffer it. Results showed, however, that both conditions acted as buffering moderators on the main association. Lastly, the combination of the two also entailed a cross-level three-way interaction effect, showing that non-prototypicality is associated with bullying only in work groups characterised by low levels on both moderators. These novel and partly unexpected results demonstrate the relevance and significance of group level explanations for workplace bullying, holding significant implications for scholars and practitioners.     

Emigration from Canada in the 1960s

Summary Emigration from Canada can be assessed only by indirect means. Here, survival ratios have been applied to the total population enumerated in the 1961 Census and to particular segments of it, so that a comparison of the calculated numbers in 1971 with the population actually enumerated indicates the volume of emigration during the decade, both in the whole population and in certain groups. Amounting to two-thirds of the number of immigrants during the same period, the estimate for the ten years is exactly double the volume of emigration reported to the Joint Parliamentary Committee on immigration policy of 1975. Since 1971, the level of emigration has probably fallen. Of the 960,000 emigrants during the decade, 42 per cent were Canadian-born. Their favourite destination was the United States; immigrants, on the other hand, tended to return home. Many immigrants now stay in Canada for only a few years. Fewer Canadians emigrate to the United States. These two factors have contributed to a new pattern of emigration, up-to-date details of which will not be ascertained before the Census of 1981.     

Robustness and monotonicity properties of generalized correlation coefficients

A new class of generalized correlation coefficients that contains the Pearson and Kendall statistics as special cases was defined by Chinchilli et al. (2005) and applied to the estimation of correlations coefficients within the context of 2×2 cross-over designs for clinical trials. In this paper, we determine the infinitesimal robustness and local stability properties of these generalized correlation coefficients by deriving their corresponding influence functions. For cases in which the population distribution is a bivariate normal or a mixture of bivariate normal distributions we obtain explicit formulas, and establish monotonicity and sign-reverse rule properties of the generalized correlation coefficients.     

On a problem with singularity in comparison of linear experiments

For consistency, the parameter space in the Gauss-Markov model with singular covariance matrix is usually restricted by observation vector. This restriction arises some difficulties in comparison of linear experiments. To avoid it we reduce the problem of comparison from singular to nonsingular case.