Variance estimation in adaptive cluster sampling

Abstract

In this paper, a class of variance estimator is proposed of a finite population variance under an adaptive cluster sampling design in the presence of information on an auxiliary variable. We obtain expressions for the mean square error and bias for the developed estimators and their performance is evaluated on a Poisson clustered process and a real data set. The simulation study evaluates the efficiency of the suggested estimators for an adaptive cluster sampling (ACS) design and the Isaki (1983 Isaki, C. T. 1983. Variance estimation using auxiliary information. Journal of the American Statistical Association 78 (381):117–23. doi: 10.1080/01621459.1983.10477939.[Taylor & Francis Online], [Web of Science ®] , [Google Scholar]) estimator of the variance for SRSWOR over the sample variance for SRSWOR.     

Locations of Decision Makers in Membership Organizations

Few studies have theorized and empirically tested variation in location of decision making in NGOs and relationship of decision location choices to accountability dimensions. Using a sample of Lebanese NGOs legally registered as membership organizations, we examine if their budget size and level of member dues, along with dependence on donors interested in democratic governance, predict who participates in their decision‐making process through involvement in preparing and formally approving the annual budget, financial records, and work plan. Our study reveals the reality of shared leadership in these organizations and suggests the value of considering the location of decision making for NGO leaders and the government regulators and funders who wish to encourage democratic processes within membership organizations.     

Developing reflective capacities in midwifery students: Enhancing learning through reflective writing

Background

Practice-based or clinical placements are highly valued for linking theory to practice and enabling students to meet graduate outcomes and industry standards. Post-practicum, the period immediately following clinical experiences, is a time when students have an opportunity to share, compare and engage critically in considering how these experiences impact on their learning. Reflective practice has merit in facilitating this process.

A structural model of subjective well-being: A comparison of ethnicity

Using secondary data analysis, we proposed and tested a structural model of subjective well-being using LISREL V. Separate analyses were performed on samples of Asians (N=142), Blacks (N=338), Hispanics (N=188), and Whites (N=293). Exogenous predictor variables were age, serious personal loss, occupational status, and employment status. Endogenous predictors were self-perceived health, physical activity, and strength of social ties. Results indicated that within group models were somewhat different from each other. We concluded that analyses done separately be ethnicity yielded more accurate representations of structural models of subjective well-being, and provide evidence that ethnic groups are reference groups in which determinants of subjective well-being operate differentially.     

Grade level differences in school satisfaction

Despite evidence that children and adolescents are much more dissatisfied with the student role than adults are with the worker role, sociologists and psychologists have devoted much more effort to examining adult age differences in job satisfaction than grade level differences in school satisfaction. In this study, scores from a 3-item school satisfaction measure were analyzed via a 12 (Grade Level) by 5 (Ethnicity) by 2 (Gender) ANOVA. Twenty-five percent of the 431 330 public school students surveyed in the state of Arizona endorsed none of the school satisfaction items. Grade level was nonlinearly related to school satisfaction. School satisfaction decreased over grades 1–8 and did not vary across grades 9–12. Ethnicity and gender did not moderate the grade level-school satisfaction relation.     

The calibration and cross-modal validation of ratio scales of political opinion in survey research

The aims of this paper are twofold: first, to set the ratio scaling of opinion in perspective by reviewing a series of laboratory and field experiments designed to build and validate ratio scales of political opinion; and second, to report in detail on the development of calibration procedures designed to obtain proportional judgments from respondents in a national survey.Paralleling explicitly a psychophysical paradigm established for the scaling of physical continua, these studies demonstrate that (1) the paradigm can be adapted to the scaling of sociopolitical opinions; (2) two measures suitable for use in surveys-magnitude estimation and line production-satisfy established psychophysical criteria for valid measures of response; (3) survey respondents can and do make reliable ratio estimates of strength of opinion; (4) scales measuring strength of political support, which are derived from the magnitude and line estimates of survey respondents, match closely the support scales derived in laboratory and field tests using such physical response modalities as handgrip and sound pressure; and (5) these calibration procedures can be incorporated in national opinion surveys.These results, especially the successful move from the laboratory to a conventional survey setting, provide social and behavioral scientists with a technique for generating response data that meet stringent measurement requirements. The calibration procedures described constitute a social metric that will enable researchers to test functional hypotheses in a more rigorous manner than is possible employing alternative scaling procedures.     

Women's use of complementary and alternative medicine in pregnancy: A search for holistic wellbeing

BackgroundA number of studies have found increased use of complementary and alternative medicine (CAM) during pregnancy and birth. However, little is known about women's motivation in seeking CAM during pregnancy or their experiences of use in relation to their pregnancy and childbirth journey.MethodsA narrative study sought to explore the meaning and significance of CAM use in pregnancy from the perspective of CAM users. Narrative style interviews were conducted with 14 women who had used a range of CAMs during pregnancy and birth. Data analysis focussed on the meaning and significance of CAM use in pregnancy and a number of core themes emerged.FindingsThis paper focusses on the theme which illustrates the meaning behind women's use of CAM in pregnancy and childbirth as one of seeking holistic wellbeing.ConclusionParticipants engaged with CAM as a way of fulfilling their physical, emotional and spiritual needs during pregnancy. Use of CAM signified women's desire to be proactive in health seeking behaviours.