Conducting research using web-based questionnaires: Practical,methodological, and ethical considerations

The use of the internet for social science research is becoming increasingly common. This paper outlines practical, methodological and ethical issues for researchers to consider when using web-based questionnaires. This is illustrated by consideration of the authors' own experience of conducting a study into the phenomenon of self-harm.     

Policy Planning Models: Heuristics for Education

Findings from a study of 229 students at five schools of social work in the introductory research course show: students with a good background in research learn best when a variety of content is introduced; students with poor backgrounds gain most with limited content. All students appear to learn best when taught by didactic methods and evaluated by objective examinations as compared to other methods. Differences in teacher characteristics such as age, field of study, and experience had little impact on student learning.     

Bayesian point null hypothesis testing via the posterior likelihood ratio

This paper gives an exposition of the use of the posterior likelihood ratio for testing point null hypotheses in a fully Bayesian framework. Connections between the frequentist P-value and the posterior distribution of the likelihood ratio are used to interpret and calibrate P-values in a Bayesian context, and examples are given to show the use of simple posterior simulation methods to provide Bayesian tests of common hypotheses.     

Estimating the Ozone Depletion Potential of Methyl Bromide

Ozone depletion potential (ODP) represents the cumulative ozone depletion induced by a particular halocarbon relative to a reference gas (usually trichlorofluoromethane, CFC-11). We focus on ODP estimation for methyl bromide. Previous attempts at its estimation have assumed that components of the ODP equation are lognormally distributed. By considering a wide range of modeling scenarios, we show that this restriction (which is based on computational convenience rather than experimental evidence) has obscured the true uncertainty in the ODP value. Moreover, when publishing point estimates for the ODP value, previous authors have given either mean or median values. We submit that a more appropriate choice for a point estimate is the mode since the distribution of ODP is skewed and since the mode is by definition, the most likely value. For each modeling scenario considered, modal values are given. In general, we find these ODP point estimates are considerably lower than those published elsewhere.     

Fertility and economic activity of women in Guatemala city, 1964

Data from a five percent census sample reveal that in Guatemala City in 1964 economically active women, especially domestic servants, had lower cumulative fertility than inactive women, partly because larger proportions of them had never married and were childless. However, even among ever married mothers there was a substantial differential, which was not due to differences in age at first birth. With respect to all women, cross tabulation and regression analysis show that age, marital status and educational attainment were more strongly associated with fertility than was activity status, but the latter also had a significant net association. Selection for sterility was not likely. Being contrary to expectations expressed in the literature, the very low fertility of the domestics received further attention. Live-in domestics had considerably lower fertility than those who lived out, which was also the case in the United States in 1960. These data and other evidence strongly suggest that this differential is due to a widespread employer preference for single or childless women. The concept of role incompatibility is therefore inapplicable to domestic servants. These findings add to the considerable evidence showing lower fertility among economically active women in large urban places in Latin America.     

Boards of directors in nonprofit organizations do they follow a life-cycle model?

In this study the authors used data from a survey of Canadian nonprofit organizations to empirically test hypotheses derived from models of nonprofit board “life cycles.” The authors suggest that while formal structural elements of board behavior change in the manner suggested by life-cycle models, the more enacted or behavioral aspects of nonprofit boards do not. The data further suggest caution in the use of life-cycle or age-dependent models to either explain or guide nonprofit board behavior.     

CONVERGENT SERIES EXPRESSIONS FOR INVERSE MOMENTS OF QUADRATIC FORMS IN NORMAL VARIABLES

Using relatively recent results from multivariate distribution theory, a direct approach to evaluating the inverse moments of a quadratic form in normal variables is proposed. Convergent infinite series expressions involving the invariant polynomials of matrix argument are obtained. The solution also depends upon a positive scalar which is arbitrarily chosen. For the solution to converge an upper bound upon this scalar is derived.     

The subpoena and a day in court: guidelines for nurses

Psychiatric nurses or therapists may be subpoenaed to appear as direct or expert witnesses. The response must be carefully prepared, and nurses must be aware that testifying in court can be an anxiety-provoking experience. Testifying often involves being an advocate for a client. Clients who have a mental illness, are developmentally disabled, or have a history of abuse or recent violence deserve a conscientious response. The legal process is the avenue for providing safety or empowerment, for assuring that needs are met, and rights are obtained, and being part of that process is an important role. Being prepared for the role is essential.     

Artificiality in Experimental Sociology*

Les auteurs démontrent que la critique du caractère artificiel de l'approche expéri-mentale en sociologie est fondée sur une fausse compréhension des buts de ce type de recherche. A la lumière des objectifs de la recherche expérimentale, l'article examine sous tous ses angles l'objection de ? l'artificialité?. L'avancé fondamental repose sur le fait que le laboratoire est un cadre d'observation parmi plusieurs autres ou la theorie abstraite peut etre mise à l'epreuve empiriquement. Les avantages et désavantages que ce cadre comporte sont reliés à l'objectif de l'en-quete. On discute les consequences qui découlent de cette prise de position. The criticism that sociological laboratory experiments are artificial, we argue, is based upon a misunderstanding of the purposes of this type of research. This paper is an examination of the “artificiality objection,” in terms of the goals of experimental research. The basic point is that the laboratory is one setting among many in which abstract theory may be tested empirically, and that the advantages and disadvantages of the setting are dependent upon the goal of research. Some consequences of this position are discussed.