Understanding and Using Mediators and Moderators

Mediation and moderation are two theories for refining and understanding a causal relationship. Empirical investigation of mediators and moderators requires an integrated research design rather than the data analyses driven approach often seen in the literature. This paper described the conceptual foundation, research design, data analysis, as well as inferences involved in a mediation and/or moderation investigation in both experimental and non-experimental (i.e., correlational) contexts. The essential distinctions between the investigation of mediators and moderators were summarized and juxtaposed in an example of a causal relationship between test difficulty and test anxiety. In addition, the more elaborate models, moderated mediation and mediated moderation, the use of structural equation models, and the problems with model misspecification were discussed conceptually.

"Mummies and babies" and friends and lovers in Lesotho

This paper examines an institutionalized friendship among adolescent girls and young women in southern Africa. Lesotho's economy is based on migrant male labor which leaves the women dependent on male earnings or subsistence from the land, and also creates unstable marital relations. Young girls in the modern schools develop close relationships, called "mummy-baby," with slightly older girls. Sexual intimacy is an important aspect of these relationships. Mummy-baby relationships not only provide emotional support prior to marriage, but also a network of support for married and unmarried women in new towns or schools, either replacing or accompanying heterosexual bonds.     

Complementary and alternative medicine: Interaction and communication between midwives and women

BackgroundMany pregnant women use complementary and alternative medicine. Although midwives are often supportive, how they communicate with women about the safe use of these therapies has received limited research attention.AimThe aim of this study was to explore how midwives interact with women regarding use of complementary and alternative medicine during pregnancy.MethodsWe utilised grounded theory methodology to collect and analyse data. Twenty-five midwives who worked in metropolitan hospitals situated in Melbourne, Australia, participated in the study. Data were collected from semi structured interviews and non-participant observations, over an 18-month period.FindingsHow midwives communicate about complementary and alternative medicine is closely associated with the meaning they construct around the woman's role in decisionmaking. Most aim to work in a manner consistent with the midwifery partnership model and share the responsibility for decisions regarding complementary and alternative medicine. However, although various therapies were commonly discussed, usually the pregnant woman initiated the dialogue. A number of contextual conditions such as the biomedical discourse, lack of knowledge, language barriers and workplace constraints, limited communication in some situations.ConclusionMidwives often interact with women interested in using CAM. Most value the woman's autonomy and aim to work in partnership. However, various contextual conditions restrain overt CAM communication in clinical practice.     

Beliefs and values and the sterilization decision

A decision-making framework based on the models of personal decision making developed by psychologists and economists and a methodology based on axiomatic conjoint measurement are used to explore individuals' beliefs and values regarding contraceptive sterilization. Particular emphasis is given to demonstrating a. that there exist individual differences in beliefs and values, b. that there exist differences in beliefs and values between persons who choose sterilization—either tubal ligation or vasectomy—and persons who choose non-sterilization contraceptive methods when no more children are wanted, and c. that the effect of beliefs and values on the sterilization decision is an interactive one. The methodology used is compared to that typically used in studying fertility- and health-related behaviors.This research was supported by grants HD-10802 and HD-14403 from the National Institute of Child Health and Human Development. The technical assistance of Doreen Victor and the editorial suggestions of Sarah Gaskill, Alice Healy, and two anonymous reviewers are greatly appreciated. This paper is Publication No. 253 of the Center for Research on Judgment and Policy, University of Colorado, Boulder, CO 80309-0344. Requests for reprints should be sent to the Publications Librarian at the Center.     

The relationships between population and economy, and between population and education]

The relationship between population and economy is regarded seriously by China and other countries. This problem can be analyzed and studied under 2 aspects: 1) the influence of economic development on changes in population, and 2) the influence of population increases on economic development. Under the 1st aspect, improved living conditions, hygiene, and health care generally result in lowered mortality rates. Improved economic conditions in China also increased the birthrate and at the same time increased birth control among the people; the increased birthrate was due to more marriages after liberation. In economically advanced countries, due to high expenses in raising children, people tend to limit family sizes to 2 children/family. Under the 2nd aspect, population increases place strains on the food supply and nutritional requirements, especially when increases are too rapid. They also demand more educational resources and influence quality of education. As there are currently 210 million students in China, the quality of education suffers, particularly at the college level, since most of Chinese manpower, physical and financial resources are spent on primary and secondary education. In terms of housing, transportation, health care, and natural resources, they are all intimately related to and influenced by increases in population. Consequently, the living standard would be difficult to raise if population increases are too rapid. Since 1971, population increases have been incorporated into 5-yearly and later yearly national economic plans in China. The large Chinese population is a major obstacle in raising the Chinese economic level, hence a well-planned population control program is essential.     

Injecting and Rejecting,Framing and Failing

This paper seeks to examine how female subjectivities are privileged by Canadian human papillomavirus (HPV) vaccination discourse and, in turn, how homosexual male subjectivities are displaced. Employing a Critical Discourse Analysis approach, I analyze selected HPV vaccination (HPVV) promotional materials, and depict the discursive strategies which privilege and exclude gendered subjectivities. My critical analysis is influenced by feminist linguistic works that seek to uncover the discursive constructions around sexuality, gender and identity, and the discursive strategies used to communicate ideas about sexual health risks and responsible citizenship. In addition, I adopt feminist theories of knowledge and power to rethink the discursive representations of some bodies and subjectivities as normal, and Others as unintelligible within HPVV discourse in today's neoliberal time.     

Family Instability and College Enrollment and Completion

This research uses data from waves I and IV of the National Longitudinal Study of Adolescent Health (Add Health, N = 9,631) to consider whether and how family instability in early or later childhood affects college enrollment and completion of a Bachelor’s degree by age 24. Explanatory factors include maternal selection into unstable unions, household resources available in adolescence, and adolescents’ academic achievement, behavior, and attitudes in high school. The association of later family instability with college enrollment and completion is largely explained by household resources in adolescence. The association of early family instability with college enrollment is partially explained by each set of factors, and its association with college completion, given enrollment, is explained by pre-existing maternal characteristics. The results demonstrate that early family instability has enduring consequences for eventual status attainment and that the mechanisms that connect family instability to educational outcomes vary by the timing of family structure change.     

山东省人口发展与工业化城镇化的互动及其协调发展

改革开放至今,山东省的人口发展与工业化城镇化发展相互促进,共同推动了人口再生产方式的转变和工业化城镇化进程,进入了健康、合理、良性互动的发展时期。但是,人口规模持续膨胀、城镇化发展水平滞后、城镇体系结构不合理、人口分布与城镇分布矛盾等问题依然制约人口与工业化城镇化的协调发展。促进人口数量、素质、结构、分布协调发展,走新型工业化和新型城镇化道路,实现人口与工业化城镇化协调发展,是山东省不懈的追求。     

The Lonely and Homeless: Causes and Consequences

Both, homelessness and loneliness are quite pervasive in North America. This study compared the causes of the loneliness experienced by the homeless to that of the general population. Two hundred and sixty six homeless and five hundred and ninety five men and women from the general population answered a 30 item yes/no questionnaire. The causes of loneliness were composed of the following five factors: Personal inadequacy, Developmental deficits, Unfulfilling intimate relationships, Relocation/significant separations, and Social marginality. The present results indicated that the causes of homeless loneliness are significantly different from those of the general population.     

人口计生宣传教育为“先导”的重心和支点

宣传教育为先导的战略决策,是国家人口计生委党组书记、主任李斌同志2007年年底在河南召开全国农村人口文化建设工作现场会和在宁波市召开全国婚育新风进万家活动经验交流会上提出的重大战略思想。宣传教育为先导战略决策的提出,是在科学发展观指引下尊重思想政治工作、精神文明建设和人口计生工作客观规律,总结正反两方面工作经验教训的必然产物,是今后做好人口计生工作的元点工程。本文主要论述了为什么要先导,先什么、导什么,如何先导三个重大问题。     

Mother-Child Relations and Adolescent Sexual Attitudes and Behavior

We hypothesize that children who are close to their parents are more likely to have attitudes and behavior that are consistent with their parents' values than children who are not close to their parents. Using data from a probability sample of 888 mother-child pairs of white women in the Detroit metropolitan area, we tested this hypothesis, using both mother's and child's attitudes toward premarital sexual intercourse and the child's report of whether he or she had engaged in premarital sexual intercourse. Unlike most previous work in this area, which has posited a direct association between the closeness of the mother-child relation and the child's attitudes and behavior, we found that the quality of the relation interacted with the mother's attitudes in its effects on the child's attitudes and behavior. Children with close relations with their mothers were more likely to hold attitudes and behave in a manner consistent with their mothers' own attitudes than children with more distant relations.     

Populations and infectious diseases: Dynamics and evolution

The host-parasite or host-pathogen system was analyzed from dynamical and evolutionary viewpoints using simple mathematical models incorporating vertical transmission, immunity and its loss. We first analyzed a model without density regulation of host population. In the analysis on dynamics, the condition for the pathogen to work as a density regulating factor was obtained. In the analysis on evolution, criteria for the evolution of host and pathogen were proposed. These criteria implies that the evolution of hosts should result in an increase in infected host density, whereas the evolution of pathogens a decrease in susceptible host density. The direction of evolution at some parameters of host and that of pathogen were examined when the parameters were independently and freely changeable. Among the parameters, only reduction in additional mortality due to infection was the evolutionary trend common to both host and pathogen. In all the other parameters examined, trend of evolution predicted in host is reversed in pathogen. We then analyzed whether the obtained criteria still hold in models with density regulation of hosts. Using randomly generated parameter sets, we obtained the result that the criteria should hold very likely though they do not always hold. We discussed evolution of virulence when there is a constraint between the traits.     

Asia's population and development in retrospect and prospect

By 1989 Asia's population will reach 3 billion. That Asia's countries can change the course of population development has been shown by China, whose population growth rate has decreased to 1.2%. 58% of the world's population in 1985 was Asian, and 53% of it was concentrated in 11 Asian countries, of which 37.6% was accounted for by India and China. Asia's population density is 3 times the world average, and the number of persons sustained by a square kilometer of land in Asia is 2.5 times the world average. Asia's population is young (median age 20.3), which means a high dependency burden, a large number of women of childbearing age, and low quality of life, as measured by infant mortality, life expectancy, and literacy. Rapid population growth ensures a low rate of development. Asia's goals are to achieve a 1% growth rate by year 2000, zero population growth and replacement level by 2015 for East Asia and 2020 for South Asia. The World Bank estimates that Asia's population will not stabilize until the end of the 21st century, by which time it will have reached 6 billion. Asia must find a way of achieving both population control and economic development. 5 recommendations are made to the Asian Forum of Parliamentarians on Population and Development (AFPPD): 1) that the AFPPD sponsor the activities of "the Day of 3 billion"; 2) that seminars and conferences on population be held among Asian nations; 3) that high-fertility countries adopt late marriages, few births, and programs for maternal and child health; 4) that organizations for family planning be strengthened and given the resources to upgrade the status of women; and 5) that international cooperation in the area of population be intensified.     

积极老龄化与中国：观点与问题透视

人口老龄化问题日益严重,如何应对其带来的挑战受到国际社会的普遍关注,而积极老龄化的提出则为人们打开了一个新的视角。文章将在回顾积极老龄化国际发展历程的背景下,在理清我国老龄化政策实践与变迁脉络的基础上,从政治、经济、文化等视角分别对我国的年龄化问题进行描述与阐释,展现我国老龄化的现实图景,并以问题为导向,探寻我国的积极老龄化之路。     

Spirituality and spiritual care in and around childbirth

BackgroundEmerging evidence points to childbirth as a spiritually felt meaningful occasion. Although growing literature and development of guidelines charge the midwife to provide spiritual care felt spiritual experiences are not addressed. There is need to revisit contemporary approaches to spiritual care in midwifery lest something of significance becomes lost in policy rhetoric.AimThe aim of this discussion paper is to bring to the surface what is meant by spiritual care and spiritual experiences, to increase awareness about spirituality in childbirth and midwifery and move beyond the constraints of structured defined protocols.MethodsThe authors’ own studies and other's research that focuses on the complex contextual experiences of childbirth related to spirituality are discussed in relation to the growing interest in spiritual care assessments and guidelines.FindingsThere is a growing presence in the literature about how spirituality is a concern to the wellbeing of human beings. Although spirituality remains on the peripheral of current discourse about childbirth. Spiritual care guidelines are now being developed. However spiritual care guidelines do not appear to acknowledge the lived-experience of childbirth as spiritually meaningful.ConclusionIntroduction of spiritual care guidelines into midwifery practice do not address the spiritual meaningful significance of childbirth. If childbirth spirituality is relegated to a spiritual care tick box culture this would be a travesty. The depth of spirituality that inheres uniquely in the experience of childbirth would remain silenced and hidden. Spiritual experiences are felt and beckon sensitive and tactful practice beyond words and formulaic questions.     

Officer friendly and the tough cop:gays and lesbians navigate homophobia and policing

Despite attempts to expand social diversity, policing is still dominated by a white, masculine, heterosexual ethos. As a consequence, employment of lesbians and gay men as police officers may be especially threatening to members of this occupation. Within the context of potential hostility and homophobia, nontraditional officers must negotiate their contradictory presence on the police force. This paper investigates that negotiation. Using the Bem Sex Role Inventory and open-ended survey data from a sample of "out" and "closeted" gay and lesbian police officers, we ask how gays and lesbians manage their images as "good cops" in the face of gender norm violations associated with their sexual orientation. Our findings indicate that masculinity and femininity do not hold together in a cohesive, dichotomous manner for these officers. Instead, other characteristics that enhance policing are emphasized to support their occupational competence. These officers see themselves as "good cops." The gendered/sexualized character of their self-perceptions appears to matter less than the context of the job, more than for a comparison sample of heterosexual police officers. We conclude that although gay and lesbian officers see their sexuality as an occupational asset, they are also likely to work harder to prove themselves as crime fighters.     

第五届亚太生殖健康大会

为推动开罗国际人口与发展大会《行动纲领》及“千年发展目标”在亚太区域如期实现,2009年10月18-20日,由中国国家人口计生委、中国计划生育协会、中国人口学会、国际计划生育联合会、联合国人口基金、人口与发展南南合作伙伴组织等共同举办的第五届亚太生殖健康大会在北京召开。     

Gender and Intergenerational Co-residence in Egypt and Tunisia

This paper compares the levels and determinants of intergenerational co-residence among older women and men in Egypt and Tunisia. Women in both settings have higher odds than do men of living in child-headed households, largely because women more often are widowed and have fewer economic resources. In Tunisia, women have higher odds than do men of living in child-headed households partly because of their poorer health. In Egypt, the odds of living in parent- and child-headed intergenerational households for unmarried compared to married older adults are higher for women than men. Disparate needs and marital histories likely contribute to the different living arrangements of older women and men in these settings.     

Economic potential and entry into marriage and cohabitation

This article explores the relationship between economic potential and rates of entry into marriage and cohabitation. Using data from the 1990 census and the 1980-1992 High School and Beyond (Sophomore Cohort), we developed a method for explicitly estimating five time-varying measures of earnings potential. The analyses of union formation are based on an intergenerational panel study of parents and children, to which our measures of earnings potential were appended. The results indicate that all five measures of earnings potential strongly and positively influence the likelihood of marriage for men, but not for women. Earnings potential does not affect entry into cohabiting unions for either men or women.     

Mortality in New Zealand and England and Wales

This paper compares age-specific mortality rates in England and Wales with those of New Zealand. Differences in rates are greatest at the younger age groups, and are particularly high for infants under 1 year and children between 1 and 5 years. The age-specific mortality rates for females under 25 years and for males under 35 years are analysed by causes of death in order to discover where the main differences between the two countries occur, and for infant mortality in England and Wales a further analysis has been made by social class. The greatest room for improvement in England and Wales mortality rates, as compared with New Zealand rates, is at ages under 5 years, and in infant mortality in particular the greatest differences between England and Wales and New Zealand rates by causes of death are for those causes usually associated with environmental influences.