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1.
Access to information may represent an important barrier to learning about and ultimately transferring to 4‐year colleges for low‐income community college students. This article explores the role that access to information technology, in particular, plays in enhancing, or possibly detracting from, the transfer function of the community college. Using data from the first‐ever field experiment randomly providing free computers to students, we examine the relationships between access to home computers and enrollment in transferable courses and actual transfers to 4‐year colleges. The results from the field experiment indicate that the treatment group of students receiving free computers has a 4.5 percentage point higher probability of taking transferable courses than the control group of students not receiving free computers. The evidence is less clear for the effects on actual transfers to 4‐year colleges and the probability of using a computer to search for college information (which possibly represents one of the mechanisms for positive effects). In both cases, point estimates are positive, but the confidence intervals are wide. Finally, power calculations indicate that sample sizes would have to be considerably larger to find statistically significant treatment effects and reasonably precise confidence intervals given the actual transfer rate point estimates. (JEL J24, O33, I23, I24)  相似文献   

2.
Measuring the difference between two Gini indexes is important in comparing the inequality between two groups. This paper systematically provides confidence intervals for this difference. First, normal approximation- and bootstrap-based confidence intervals are provided for the difference. Second, empirical likelihood (EL)-based confidence intervals are proposed according to a ratio statistic that is proven to have a weighted Chi-squared distribution with one degree of freedom. Third, two calibration approaches are established to improve the undercoverage issue of the EL method; these two approaches are augmented EL and bootstrap-calibrated EL. Monte Carlo simulations show that bootstrap-calibrated EL generally outperforms other methods in constructing confidence intervals. In the simulations, these methods are compared with the permutation method to test the equality of two Gini indexes. Lastly, these methods are applied to real data.  相似文献   

3.
Since elder abuse was first acknowledged as a health care and social problem, incidence and prevalence of mistreatment has been assessed sparingly in the United States and other countries around the world. Standardized instruments for determining the prevalence of elder abuse have not been developed and other instruments measuring a person's function and spousal violence have been adapted for the measurement of elder abuse prevalence. The purposes of this paper are to (1) ascertain the reading grade level of the most frequently used elder abuse prevalence instrument's text and (2) determine the content validity of the instruments with respect to the types of elder abuse included in them. A review of the instruments used to measure elder abuse prevalence was completed and a questionnaire was developed to measure the reading grade level and type of elder abuse content in four instruments. The Fry Readability, Flesch Reading Ease, and McLaughlin Grading formulas were used to determine reading grade level. A questionnaire regarding content validity was sent to 69 faculty and staff in one university department and a 59% return was achieved. The Conflict Tactics Scale and the Hwalek-Sengstock Elder Abuse-Screening Test had the lowest mean score at the 6th grade reading level. Results of content analysis for types of elder abuse demonstrated none of the instruments are comprehensive. Instruments to measure the prevalence are needed which balance readability and content validity.  相似文献   

4.
College newspapers are a powerful but underutilized medium for educating students on health issues, including those related to drug and alcohol use on campus. Editors of these publications are in a position to wield significant influence among their readers. In addition to communicating factual information about the prevalence and impact of substance use among college students, editors can use the press to advocate changes in students' attitudes and behaviors and in college or community policies that affect substance use. A pilot conference was held to help New England college newspaper editors perceive the importance of their role in educating their peers about substance use and other health-related issues, and to offer concrete suggestions as to how they can incorporate these topics into an "activist" campus press.  相似文献   

5.
The network autocorrelation model has been extensively used by researchers interested modeling social influence effects in social networks. The most common inferential method in the model is classical maximum likelihood estimation. This approach, however, has known problems such as negative bias of the network autocorrelation parameter and poor coverage of confidence intervals. In this paper, we develop new Bayesian techniques for the network autocorrelation model that address the issues inherent to maximum likelihood estimation. A key ingredient of the Bayesian approach is the choice of the prior distribution. We derive two versions of Jeffreys prior, the Jeffreys rule prior and the Independence Jeffreys prior, which have not yet been developed for the network autocorrelation model. These priors can be used for Bayesian analyses of the model when prior information is completely unavailable. Moreover, we propose an informative as well as a weakly informative prior for the network autocorrelation parameter that are both based on an extensive literature review of empirical applications of the network autocorrelation model across many fields. Finally, we provide new and efficient Markov Chain Monte Carlo algorithms to sample from the resulting posterior distributions. Simulation results suggest that the considered Bayesian estimators outperform the maximum likelihood estimator with respect to bias and frequentist coverage of credible and confidence intervals.  相似文献   

6.
ABSTRACT

Objective: The aim of this study was to estimate the prevalence of elder abuse and neglect in Iran.

Methods: We searched PubMed, Embase, Scopus, and PsycINFO by the end of 2017. The prevalence was calculated based on the percentage or the amount reported in the studies. Heterogeneity was assessed by the I2 statistic, and the data were combined using random effects model. The results were reported as the pooled estimates and the 95% confidence intervals (CIs). The review protocol was registered in PROSPERO (CRD42017070744).

Results: A total of 16 studies involving 6,461 participants aged 60 years and over were included. The pooled prevalence for overall elder abuse was 45.7% (95% CI: 27.3–64.1, p < .001).

Discussion: The prevalence of elder abuse and neglect is substantial in the Iranian population aged 60 years and over. More research is needed to investigate the actual prevalence of elder abuse at the national level.  相似文献   

7.
Stimulated by debates on public sociology in the recent years I studied contributions of sociologists in daily newspapers in Austria. Although sociologists are rather present in the Austrian press, I argue this remains without noticeable effects on public opinion formation; the topics sociologists write and talk about are rather arbitrary and they lack factual content. Although my data refers to sociologists in the Austrian press, the study’s conclusions might be true to the wider sociological community: Through such exposure, a public profile of sociology cannot evolve. Furthermore, the article discusses criteria that prevent and complicate the relationship between sociologists and the press: avoidance of publicity, the problem of values and ideology, incompatibilities of language-games, divergence of relevance criteria, and deficient cultural empathy.  相似文献   

8.
A content analysis of all 2001 Fortune 500 Company Web sites was conducted to determine how corporations are using the Web to meet the informational needs of journalists. Analyses revealed that the majority of Web sites do not have dedicated press rooms where media content is centralized. In press rooms, news releases, executive biographies and executive photographs are the most commonly included materials. Statistical analyses suggest that higher-ranking companies more often provide press rooms and materials in press rooms than lower-ranking companies.  相似文献   

9.
This article reviews the extant published and unpublished studies that estimate the prevalence of adolescent gambling problems in North America. The nine nonduplicative studies identified by our literature search included data collected from more than 7700 adolescents from five different regions of the United States and Canada. In addition to comparing the conceptual and methodological differences that exist among these studies, this article employed a meta-analytic strategy to synthesize prevalence estimates from the existing studies. This analysis revealed that within a 95 percent confidence interval, between 9.9% and 14.2% of adolescents are at risk of developing or returning to serious gambling problems. Similarly, between 4.4% and 7.4% of adolescents exhibit seriously adverse compulsive or pathological patterns of gambling activity. Finally, the discussion proposes a generic multi-level classification scheme to reconcile the divergent classification methods and data reporting strategies. This new multi-level approach to reporting gambling prevalence will facilitate interstudy comparisons among existing estimates of gambling prevalence and help to provide a general data reporting system for future research.  相似文献   

10.
ABSTRACT

Most master of social work (MSW) programs provide minimal education or training on suicide prevention, intervention, and postvention despite that the majority of social workers encounter suicidal clients during their professional careers. This study describes the development, implementation, and evaluation of a course on suicide in an MSW program. Changes in student suicide-related knowledge, confidence, and preparedness were evaluated using a pre/post design. We found statistically significant increases in knowledge (t [df = 21] = 4.79; < .001), confidence (t [df = 17] = 8.55; < .001), and preparedness (t [df = 20] = 7.28; < .001) from pretest to posttest. Knowledge, confidence, and preparedness were significantly positively correlated, indicating that confidence and preparedness did not increase without a corresponding increase in knowledge. Given the prevalence of suicide and the frequency with which social workers serve populations affected by suicide, it is critical that MSW programs provide effective training on understanding suicide.  相似文献   

11.
This paper, which is the first large-scale application of respondent-driven sampling (RDS) to nonhidden populations, tests three factors related to RDS estimation against institutional data using two WebRDS samples of university undergraduates. First, two methods of calculating RDS point estimates are compared. RDS estimates calculated using both methods coincide closely, but variance estimation, especially for small groups, is problematic for both methods. In one method, the bootstrap algorithm used to generate confidence intervals is found to underestimate variance. In the other method, where analytical variance estimation is possible, confidence intervals tend to overestimate variance. Second, RDS estimates are found to be robust against varying measures of individual degree. Results suggest the standard degree measure currently employed in most RDS studies is among the best-performing degree measures. Finally, RDS is found to be robust against the inclusion of out-of-equilibrium data. The results show that valid point estimates can be generated with RDS analysis using real data, but that further research is needed to improve variance estimation techniques.  相似文献   

12.
This article provides an analysis of how Jewish rituals and Jews as a minority group are represented and debated in the Norwegian press: How is “news about the Jews” framed by the media? Which discourses dominate the debates? Are notions of what it “takes to be Norwegian” put forward in these cases? The article is also an analysis of Jewish voices in the press, and based on the fact that Jewish advocates refer to minority-based legal rights suggests that the Jewish minority benefits from the use of a broader international human rights discussion in the press. I claim that a multicultural discourse provides the Jewish minority with language that makes it possible to argue for cultural rights without referring to Jewishness; offering protection against a general fear of anti-Semitism.  相似文献   

13.
In this article I argue that the production of live music shares many formal properties with that of confidence games: specifically, (1) a set of structural relationships in which operators, ropers, insiders, shills and marks are enmeshed, (2) the deployment of carefully planned strategies of deception, and (3) a pattern of success owed in part to the moral and financial motivations of insiders, the willingness of the state to assist in the enterprise, and the desire among victims to be swayed by the production. Drawing on ethnographic research conducted in some of Chicago's most popular blues clubs, I examine these three components of live music production qua confidence game. I also briefly discuss how one group of participants—local blues musicians—reacts to their own performances as musicians/confidence artists. Finally, I conclude by exploring the broader implications this case suggests regarding other types of live music production.  相似文献   

14.
Public opposition to immigration in Britain reflects perceptions of immigrants that focus disproportionately on “illegal” immigration and asylum seekers, rather than more numerous workers, students, and family members. This study examines coverage of immigration in the British national press, to see whether press portrayals of migrants provide a basis for these images of immigration underlying public attitudes. We use corpus linguistic methods to analyze 43 million words of news from 2010 to 2012. Among other findings, we show that press portrayals match public perceptions of migrants, with “illegal immigrants” and “failed asylum seekers” as predominant depictions in broadsheet and tabloid newspapers.  相似文献   

15.
Content analysis of activist organization Websites determined how activists use online resources in media relations. Seventy-four activist Websites were analyzed. About one-third (32.4%) included organized online press rooms. The most common media relations materials were organizational history (70.3%), organizational mission statement (54.1%), organizational publications (47.3%), press releases (33.8%), and policy papers (31.1%). Activist Websites did not provide strong dialogic features for journalists, but dialogic features were more available for the general public. Theoretical implications are examined and 6 recommendations are made for improving online activist press relations.  相似文献   

16.
The social presence of African American boxing champion Jack Johnson stands out among the most controversial social and media issues of the early 20th century. This study examines the manner in which press agentry shaped and animated this 6-year historical episode. It portrays press agentry not merely in terms of personalities, but also in terms of a network of social and economic affiliations among promoters, sports celebrities, and the press. I argue that understanding these affiliations not only better informs the Johnson situation, but it also sheds light on the ambivalent relationship between journalism and publicity practices over time.  相似文献   

17.
18.
"This article develops a method for estimating the probability of emigration conditional on the observed characteristics of individuals. In addition, it is shown how to calculate the mean, standard error, and confidence intervals of the conditional probability of emigration given a random sample of emigrants. The technique is illustrated by providing statistically consistent estimates of the probability an Italian would emigrate to the United States in 1901 and 1911, conditional on personal attributes."  相似文献   

19.
Research on the neural correlates of decision making in gambling tasks may be informative for understanding problem gambling. The present study explored confidence and overconfidence using magnetoencephalography (MEG) to measure brain activity during a judgment task. Nineteen undergraduates who self-identified as frequent gamblers (average age 19.7 years; 5 females, 14 males) participated in this study. Participants first completed the DIGS (Winters, Specker & Stinchfield, 2002), a measure of gambling pathology. They then engaged in a behavioral task of confidence assessment, wherein they answered two-alternative trivia questions and estimated the probability that each answer was correct. In a subsequent MEG task, they viewed the questions and a target answer, and indicated with a button press whether the target matched the correct answer. Confidence was directly related to activity in the right prefrontal cortex. Matching and mismatching targets were associated with activity in the medial occipital cortex and left supramarginal gyrus, respectively. An interaction of pathology and match/mismatch was observed in the right inferior occipital-temporal junction region, showing more activity following a mismatch in non-problem gamblers, but not in problem gamblers. Implications of the results for understanding of top–down modulation and attentional systems are discussed in relation to gambling behavior.  相似文献   

20.
This paper reports on empirical research into how press releases are being constructed. It starts from previous discourse-analytic work which has pointed to the 'preformulated' nature of press releases: in particular, it has been shown that through a number of metapragmatic features press releases can easily be copied by journalists in their own news reporting. In this paper we set out to subject one of these features, viz. pseudo-quotations (or so-called constructed direct speech), to a further empirical study, in which we scrutinize the process of constructing the press releases. We propose a detailed analysis of this process by combining ethnographic fieldwork with some of the methodology of cognitive psychology, including think-aloud protocols and on-line registration of the writing process. On the basis of this case study it is concluded that the design and functions of quotations in press releases are more complex than has been assumed so far. In addition, our preliminary results indicate that the combination of methods that we propose in this paper provides a sound starting point for both quantitative and qualitative analysis, allowing for a detailed analysis and interpretation of how press releases are being constructed.  相似文献   

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