Quantitative alternatives to narrative reviews for understanding existing research literature

This article is the second in a series that examine the role of literature reviews in rehabilitation research. Methods of generating new knowledge from existing literature are categorized into three approaches: synthetic literature reviews which interpret previous findings in narrative fashion, quantitative literature reviews which summarize findings from primary research studies using a variety "counting" approaches, and meta-analyses which aggregate effect sizes from primary research studies and allow for a more complex analysis of trends in the empirical research literature. This articles examines the role that quantitative literature reviews can play in better understanding the status of knowledge in rehabilitation research, thereby shaping field practices as well as future scientific investigations. Examples of quantitative reviews from contemporary rehabilitation and related health sciences literature are provided throughout the article.     

A Biologically-Based Dose—Response Model for Developmental Toxicology

The methods currently used to evaluate the risk of developmental defects in humans from exposure to potential toxic agents do not reflect biological processes in extrapolating estimated risks to low doses and from test species to humans. We develop a mathematical model to describe aspects of the dynamic process of organogenesis, based on branching process models of cell kinetics. The biological information that can be incorporated into the model includes timing and rates of dynamic cell processes such as differentiation, migration, growth, and replication. The dose-response models produced can explain patterns of malformation rates as a function of both dose and time of exposure, resulting in improvements in risk assessment and understanding of the underlying mechanistic processes. To illustrate the use of the model, we apply it to the prediction of the effects of methylmercury on brain development in rats.     

Job design and levels of physical and mental strain among Australian prison officers

Over the past 15 years much has been made of the moderating influence of job discretion and support in occupations that are perceived to be high in demands. Such an effect seems to be most prevalent when subject populations are large and heterogeneous. One aim of this study was to examine the influence of subjective perceptions of these variables on strain reactions among a group of relatively homogeneous workers such as, in the present study, prison officers (n = 274). A second aim was to extend previous research and examine the joint influence of negative affectivity and perceptions of demands, discretion, and support on mental and physical well-being. It was hypothesized that those high in negative affect would be particularly strained by jobs perceived as being demanding. The hypothesized relationship between job demands, discretion and support were found to be weak and at times inconsistent. Social support, in particular, was found to have both positive and negative consequences for different aspects of well-being. Those high in negative affect were in general found to suffer lower mental well-being. More importantly, the interactive effect of negative affectivity and job demands was found to significantly predict the majority of the dependent variables used in this study. The valences of these relationships were inconsistent and are interpreted in light of Warr's (1987) vitamin model of stress.

There are several conclusions that can be drawn from the present study. Negative affectivity appears to have a truly interactive effect with job components, job demands in particular, to influence a range of variables relating to physical and mental health as well a job-related attitudes. The nature of these effects, however, suggests a dissociation in the ways that different independent variables influence a range of indices of well-being and affect. This result requires further investigation since there are important theoretical implications which will follow if the data are replicable.

In order to examine such complex effects, in addition to the need for more longitudinal studies, it is also important that standardized measures of job components are developed so that levels of stress exposure can be equated and their impact assessed across organizational settings.

Finally, the data reported in this study suggest that some effective stress management may be undertaken by adopting selection strategies which take into consideration individual characteristics. In view of the fact that individual stress management programmes are of unproven benefit (Murphy 1986, 1988) such an approach is recommended especially for those organizations which are highly constrained in the services that must be performed.     

Monitoring antitobacco sentiment among community leaders

Two public health objectives, one methodological and the other substantive, are realized in the present study. First, average survey ratings are replaced by negated mean cumulative logits (MCLs), which have the advantage of interitem commensuration. Second, these negated MCLs improve the analysis of two Florida tobacco control surveys of community leaders. Because of their common logit metric, negated MCLs for different item types are compared on their expressed antitobacco sentiment. They are also averaged to construct a precise indicator of overall sentiment. These results show that in 1998 and 1999, community leaders were most averse to selling to minors, kids buying cigarettes, and restaurant and workplace smoking. The latter aversion anticipated voters' overwhelming support of the 2002 Florida constitutional amendment prohibiting smoking in restaurants and workplaces. The authors hope that this analysis for antitobacco programs will improve other substance-abuse monitoring with surveys whose items are yet unwritten.     

HUMAN SERVICE ORGANISATIONS REVISITED: STILL A USEFUL CONCEPT IN THE 1990S?

Recent changes in the circumstances and operations of human service operations demand a reappraisal of the use of the term ‘human service organisation’. The definitional statements offered a decade ago are re-examined here; and revisions are proposed for all of them to reflect changes in the purposes, value base, resources, accountability, methodology and consumer relations of human service organisations. An additional definitional statement is proposed to refer to the vulnerability of their situation in the present environment. As an alternative to separate categories of organisations, it is suggested that each can be assessed in relation to two criteria, related to their auspices and resources, and the purpose of their operations. On this basis some organisations can still be designated human service organisations, with important implications for their management and governance.     

The confrontation clause and the child victim of sexual abuse

Courtroom proceedings for child sexual abuse often represent a morass of conflicting rights and counterproductive justice. Within this article, conflicting rights of adults and children regarding courtroom testimony are explored with an interest in assessing the effects of testifying for children and addressing the process of making children's testimonies less traumatic and more credible.     

The components of family policy education

The study of family policy in the United States began relatively recently. The academic community increasingly has shown interest in this new policy arena. Much of the conceptual writing on family policy emerged from disciplines such as family studies, social work, political science, economics, and sociology. These academic units have recently modified their course curricula to include more family policy content. These family policy education efforts are discussed in this article. Specific suggestions are made concerning the development and content of family policy education, broader educational training for those who want to pursue a career in family policy, and future goals and directions for family policy education. She received her Ph. D. in Human Development and Family Studies from The Pennsylvania State University. Her research interests are in the family and health policy arenas, with particular focus on ethnically diverse populations. Her most recent research is on homeless children and mothers. She received her Ph.D. in Family Social Science from the University of Minnesota. Her teaching and research interests are workplace and family issues and family policy and impact analysis.