Reviews

Book reviewed in this article: Relationship Counselling For Children, Young People and Families Geldard, K. Geldard, D. MENDS Counsellor Manual: A Structured Approach to Assisting Men in Relationship Crisis: Pershouse, Owen C.     

Modelling the spread in space and time of an airborne plant disease

Summary.  A spatiotemporal model is developed to analyse epidemics of airborne plant diseases which are spread by spores. The observations consist of measurements of the severity of disease at different times, different locations in the horizontal plane and different heights in the vegetal cover. The model describes the joint distribution of the occurrence and the severity of the disease. The three-dimensional dispersal of spores is modelled by combining a horizontal and a vertical dispersal function. Maximum likelihood combined with a parametric bootstrap is suggested to estimate the model parameters and the uncertainty that is attached to them. The spatiotemporal model is used to analyse a yellow rust epidemic in a wheatfield. In the analysis we pay particular attention to the selection and the estimation of the dispersal functions.     

Work, employment and mental health in Europe

In May 2004 the World Health Organization (WHO European Region) called a consultation meeting of its Collaborating Centres in Occupational Health to discuss mental health in the workplace. The meeting took place in Copenhagen. This paper presents an interpretation of the discussion that took place and the thinking that developed as a result. It was argued that increased interest and research and improved practice in the area of occupational mental health are required to promote good mental health in the European population. A framework of risk management and prevention based on sound evidence and good understanding could provide the basis for the translation of existing research knowledge into effective practice.     

Residual-based specification of the random-effects distribution for cluster data

We propose a method for specifying the distribution of random effects included in a model for cluster data. The class of models we consider includes mixed models and frailty models whose random effects and explanatory variables are constant within clusters. The method is based on cluster residuals obtained by assuming that the random effects are equal between clusters. We exhibit an asymptotic relationship between the cluster residuals and variations of the random effects as the number of observations increases and the variance of the random effects decreases. The asymptotic relationship is used to specify the random-effects distribution. The method is applied to a frailty model and a model used to describe the spread of plant diseases.     

The validity of the occupational stress indicator

This paper investigates the validity of four subscales of the Occupational Stress Inventory (OSI). Data derived from a sample of British managers are used to generate a multitrait-multimethod matrix. The results obtained suggest that three of the four OSI sales (job satisfaction, mental health, type A behaviour) show acceptable validity. The fourth scale (locus of control) needs further development. Further analysis, using multiple regression procedures, was conducted to explore the validity of the theoretical ideas underlying the OSI. The results reveal that both sources of pressure at work and type A behaviour are linked to mental health and job satisfaction.     

HRM Practices and Employee Commitment: Possibilities, Pitfalls and Paradoxes

Much recent writing on Human Resources Management (HRM) has emphasized the desirability of a committed workforce and the central role of HRM practices in establishing and maintaining such commitment. Little empirical evidence for such effects has been presented however, and the conceptualization of employee commitment has often been confused, failing to recognize its multi–dimensional nature. Researchers have sought to identify the antecedents of commitment, concentrating on personal/demographic, task, role and supervisory style variables taken from job satisfaction research. With regard to organizational and career commitment, it may be more fruitful to examine the impact of HRM policies and practices. Several studies undertaken by the authors demonstrating the impact on employee commitment of such HRM practices as selection, assessment, induction and training are reviewed, indicating the possibilities for research and practice in this area. Such studies also reveal some pitfalls in the over–simple, uncritical models of commitment often presented, and some paradoxical findings from the authors' own work are used to present a more adequate perspective on the commitment process.     

The future of private sector unions in the U.S.

Conclusion As noted, the union movement’s significant decline during the last four decades is primarily a private sector phenomenon. Since the mid-1950s, the union density of private sector workers has dropped from more than a third to less than a tenth, in contrast to that found in government employment, which is now about 37 percent. We are indebted to the Donner Foundation for support and to Noah Meltz and Rafael Gomez for research and intellectual advice.     

SFILTEX: toward an expert system for time-series filter design

This paper describes an attempt to develop a statistical expert system (FILTEX) as an intelligent aid for time-series filter design. To this end the knowledge of the filter design strategy is represented in Prolog and coupled with numerical routines of a general purpose signal processing package. This knowledge-based system is conceived as a set of independent knowledge sources integrated into a system by a blackboard mechanism which embodies overall control of the filter design process. Modularity and flexibility of knowledge representation in such a framework preserve usability of the evolving system during its development from the original numerical package to an expert system for filter design. This approach seems to be more flexible than the use of shells and less time consuming than building from scratch. A novel method for incorporating classical statistical information into an uncertainty management mechanism is presented. Experimental results confirm the feasibility of the approach and set directions for further research.     

WHAT'S HAPPENED TO FAMILY INTERACTION RESEARCH? AN HISTORICAL ACCOUNT AND A FAMILY SYSTEMS VIEWPOINT

The origins and evolution of family interaction research are outlined in order to examine the apparent lag in the field after the initial hopes and enthusiasms of the 1960s. It is argued that family interaction research naturally drew upon the methodology of social psychology and that there was an insufficient integration of the implications of the clinical viewpoint of family systems theory into research procedure. A discussion is presented of some central concepts in scientific psychology, drawing conclusions as to how they can be broadened for the special field of family research. An experimental method for evaluating the public verifiability of complex clinical notions is described, and a number of recent investigations are scrutinized in the light of our critique. It is concluded that there are grounds for being optimistic that the gap between clinical and research thinking can be bridged, making the assessment and refinement of abstract and intricate concepts discovered in clinical procedures accessible to scientific experimentation.