A qualitative study investigating adolescents' understanding of aggression,bullying and violence

There is a general consistency across the research literature regarding the definition of bullying. This has filtered down into the construction of governmental and school anti-bullying policies around the world. However, research suggests that children and adolescents are failing to accurately identify cases of bullying. This in turn has implications upon the accuracy of our perception of the extent of the problem of bullying within schools. The current study aimed to investigate how 11–17 year olds understand and differentiate between terms relating to interpersonal peer aggression, violence and bullying. Fifty-seven (twenty male, thirty-seven female) participants were recruited via an opportunity sample. Participants took part in focus group interviews within which they were asked to provide a definition for a list of words relating to both traditional and cyber forms of aggression, bullying and violence. Thematic analysis revealed that the participants held a shared understanding of the terms relating to aggression, bullying and violence. Participants defined each term by describing the behaviors involved, their perception of the level of control the perpetrators of each type of negative peer interaction have and the perception of those involved. The implications of these findings for both policy and future research are discussed.     

ESTIMATION OF THE CONCENTRATION PARAMETERS OF THE FISHER MATRIX DISTRIBUTION ON 50(3) AND THE BINGHAM DISTRIBUTION ON Sq, q≥ 2

Two procedures are considered for estimating the concentration parameters of the Fisher matrix distribution for rotations or orientations in three dimensions. The first is maximum likelihood. The use of a convenient 1-dimensional integral representation of the normalising constant, which greatly simplifies the computation, is suggested. The second approach exploits the equivalence of the Fisher distribution for rotations in three dimensions, and the Bingham distribution for axes in four dimensions. We describe a pseudo likelihood procedure which works for the Bingham distribution in any dimension. This alternative approach does not require numerical integration. Results on the asymptotic efficiency of the pseudo likelihood estimator relative to the maximum likelihood estimator are given, and the two estimators are compared in the analysis of a well-known vectorcardiography dataset.     

The ubiquitous angle

Summary.  Previously we used the geometry of n -dimensional space to derive the paired samples t -test and its p -value. In the present paper we describe the 'ubiquitous' application of these results to single degree of freedom linear model hypothesis tests. As examples, we derive the p - and t -values for the independent samples t -test, for testing a contrast in an analysis of variance and for testing the slope in a simple linear regression analysis. An angle θ in n -dimensional space is again pivotal in the development of the ideas. The relationships between p , t , θ , F and the correlation coefficient are also described by using a 'statistical triangle'.     

ASPECTS OF CORRELATION IN BIVARIATE POISSON DISTRIBUTIONS AND PROCESSES

This paper reviews some interesting but scattered results that are known about correlation in bivariate Poisson distributions and processes and presents some new results. A particular concern in both contexts is with results and examples relating to negative correlation.     

The Proportion of Gaming Revenue Derived from Problem Gamblers: Examining the Issues in a Canadian Context

The legitimacy of government-sponsored gambling and its continued expansion depends in part on the impact that gambling has on society and the extent to which gambling revenue is derived from vulnerable individuals. The purpose of the present article is to try to establish a valid estimate of the proportion of gaming revenue derived from problem gamblers in Canada. Using recent secondary data collected in eight Canadian provinces, we estimate this proportion to be 23.1%, compared to a problem gambling prevalence rate of 4.2%. This estimate must be seen as tentative, however, as self-reported expenditures are 2.1 times higher than actual provincial gaming revenues.