Comparison of three estimators of the number of species

We consider estimation of the number of cells in a multinomial distribution. This is one version of the species problem: there are many applications, such as the estimation of the number of unobserved species of animals; estimation of vocabulary size, etc. We describe the results of a simulation comparison of three principal frequent-ist' procedures for estimating the number of cells (or species). The first procedure postulates a functional form for the cell probabilities; the second procedure approxi mates the distribution of the probabilities by a parametric probability density function; and the third procedure is based on an estimate of the sample coverage, i.e. the sum of the probabilities of the observed cells. Among the procedures studied, we find that the third (non-parametric) method is globally preferable; the second (functional parametric) method cannot be recommended; and that, when based on the inverse Gaussian density, the first method is competitive in some cases with the third method. We also discuss Sichel's recent generalized inverse Gaussian-based procedure which, with some refine ment, promises to perform at least as well as the non-parametric method in all cases.     

Demographic determinants of perceived well-being in eight European countries

This paper reports results of a harmonised study of subjective social indicators carried out in eight member countries of the European Community, sponsored, on an experimental basis, by the Statistical Office of the European Communities (Luxembourg). Comparative data from nationwide representative samples from Germany, France, Italy, the Netherlands, Belgium, the United Kingdom, Ireland and Denmark are presented for three key dependent measures of perceived well-being: Self-Assessed Health, Satisfaction with Housing and Life Satisfaction. The cross-cultural generalisability of the influence of demographic variables on these three measures in examined, using 4-way analysis of variance. The analyses revealed a remarkable consistency across nations in terms of the effects of certain demographic variables on some of the dependent measures; however, some inconsistencies were also revealed. Substantial discrepancies in mean scores of the same sub-groups in different countries were also observed. While further research would be required to determine whether these differences were due to objective circumstances or to cultural differences in subjective perceptions or response patterns, some tentative interpretations of the differences were put forth.     

Impact of Empowerment Training on the Professional Work of Family Peer Advocates

A pilot study using a prospective design examined the impact of a collaboratively developed training model, called the Parent Empowerment Program (PEP), for professionally-employed family peer advocates who work with caregivers of children with mental health needs. This training used a combination of didactic, practice exercises, and group discussion. It targeted specific mental health knowledge content and collaborative skills to facilitate the work of family peer advocates in empowering caregivers. Co-delivered by a family peer advocate and clinician, the training consisted of a 40-hour face-to-face training, followed by six monthly face-to-face booster sessions. A total of 15 advocates participated in assessments conducted at baseline and post-training. This group of experienced family peer advocates showed no significant increase in knowledge about mental health content, but post-training assessments indicated increased collaborative skills and mental health services self-efficacy. This initial evaluation has implications for expanding training and support for the emergent workforce of professionally-employed family peer advocates in children's mental health.     

Building Strength Through Challenging Homophobia: Liberation Workshops with Younger and Midlife Irish Lesbians

Drawing on the theoretical framework of liberation psychology, this article details workshops on liberation psychology conducted in Ireland with lesbian and transgendered persons aged from early 20's to late 50's. Both younger and older lesbians in the workshops benefited from the opportunity to focus on oppression and to explore options for transformation. The workshops illustrated many of the strengths and vulnerabilities associated with living with homophobia and demonstrated the value of action and engagement. Midlife lesbians were more aware of the systemic nature of homophobia and of the negative emotions related to that. They saw many of these as understandable and even necessary reactions to oppression rather than as negative patterns. These older lesbians tended to be more accepting of the course their lives had taken and of the ways in which choices had been influenced by homophobia and heterosexism. They tended to be more relativistic in their views on coming out, viewing coming out as a decision for each context rather than an overall principle. They valued the importance of community and of activism, and though they were aware of some of the challenges, they also had more positive experiences in this area. These strengths can facilitate managing both homophobia and aging more effectively.     

The Relationship Between Hope,Eustress, Self-Efficacy,and Life Satisfaction Among Undergraduates

The construct of eustress was studied alongside hope and self-efficacy, to explore how these constructs are related to life satisfaction among undergraduates. Questionnaires were administered to undergraduates to test the hypotheses that (1) as eustress levels increase, so will life satisfaction levels; (2) when eustress, hope, and self-efficacy are examined together, they will predict life satisfaction better than eustress alone; (3) eustress, hope, and self-efficacy will all be positively correlated with life satisfaction; and (4) self-efficacy will be the most positively correlated with life satisfaction. The results revealed a significant positive correlation between eustress and life satisfaction. A Hierarchical Linear Regression analysis revealed significant results supporting hypotheses 2 and 3, but not hypothesis 4. Results indicated that hope is the best predictor of life satisfaction. The work reported provides a reliable tool for measuring eustress, examines eustress in a new way at the academic level, and provides helpful information about student wellness to college administrators.     

Projecting Australia's Fertility—Postscript

An accelerated decline in family size has led to a downward revision of projected fertility. Replacement fertility could be reached in the 1980s with births numbering about 250,000 a year. The population is approaching stability at the younger ages. The potential for poverty arising from large families may be halved in ten years.     

Measuring the Dynamics of Interactional Synchrony

Past research has revealed that natural social interactions contain interactional synchrony. The present study describes new methods for measuring interactional synchrony in natural interactions and evaluates whether the behavioral synchronization involved in social interactions is similar to dynamical synchronization found generically in nature. Two methodologies, a rater-coding method and a computational video image method, were used to provide time series representations of the movements of the co-actors as they enacted a series of jokes (i.e., knock?Cknock jokes). Cross-spectral and relative phase analyses of these time series revealed that speakers?? and listeners?? movements contained rhythms that were not only correlated in time but also exhibited phase synchronization. These results suggest that computational advances in video and time series analysis have greatly enhanced our ability to measure interactional synchrony in natural interactions. Moreover, the dynamical synchronization in these natural interactions is commensurate with that found in more stereotyped tasks, suggesting that similar organizational processes constrain bodily activity in natural social interactions and, hence, have implications for the understanding of joint action generally.     

Exporting Brotherhood: Orangeism in South Australia

The idea of fraternity, and how to organise it, was one of nineteenth-century Europe's invisible exports to the New World. This paper explores the international diffusion of the Loyal Orange Institution, with comparative reference to Freemasonry, its main model. Three alternative explanations are discussed for its appeal outside Ireland (that it facilitated the assimilation of emigrants, transmitted ‘tribal’ Irish animosities to fresh contexts, or adapted itself to pre-existing sectarian rivalries abroad). These hypotheses are tested used evidence from South Australia, where Orangeism flourished in the absence of heavy Ulster immigration. A collective profile of Orange South Australia is derived from Lodge records showing age, religious denomination and occupation, and the appeal of Orangeism is related to local political and religious contexts. In this case at least, Orangeism was primarily an export of organisational techniques rather than of Irish personnel or Irish bigotry.