Growing evidence suggests that lesbian, gay, and bisexual adults may be at elevated risk for mental health and substance use disorders, possibly due to anti-gay stigma. Little of this work has examined putative excess morbidity among ethnic/racial minorities resulting from the experience of multiple sources of discrimination. The authors report…

In this paper, I use a nationally representative sample of American high school seniors in 1992 to examine change and stability in the employment patterns of youth as they make the transition from high school to college. Students with weak attachments to the labor force in high school tend to remain unemployed during the first year of college.…

The authors propose a strategy for studying the effects of time-varying instructional treatments on repeatedly observed student achievement. This approach responds to three challenges: (a) The yearly reallocation of students to classrooms and teachers creates a complex structure of dependence among responses; (b) a child's learning outcome under a…

In this article, the author investigates the relationship between undergraduate student loan debt and degree attainment. Using data from the Beginning Postsecondary Student (BPS) surveys in 1995-1996 and 2000-2001, she examines whether the relationship between debt and degree attainment is different for students with different parental income…

Background: The purpose of this study was to identify the prevalence and the main risk factors of poor posture in school children in the Czech Republic. Methods: The cross-sectional study examined representative sample of children aged 7, 11, and 15 years in the year 2003. From the overall number of 3600 children, 3520 (97.7%) attended and were…

Contingency tables, and their associated statistical tests, are frequently used in educational and social research. Popular statistical tests used in contingency table analyses include the Pearson chi-square test and the likelihood ratio chi-square test. These two tests are chi-square distributed under large sample conditions. However, when a…

Probability-based inference in complex networks of interdependent variables is an active topic in statistical research, spurred by such diverse applications as forecasting, pedigree analysis, troubleshooting, and medical diagnosis. This paper concerns the role of Bayesian inference networks for updating student models in intelligent tutoring…

The role of the response probability convention in reporting results from the 1992 National Adult Literacy Survey is explored, using interviews with more than 26,000 adults and young adults. In order to summarize what respondents of a particular proficiency can do, it is convenient to adopt a convention for a sufficient response probability that…

For much of the twentieth century, Markov theory and Markov processes have been widely accepted as valid ways to view statistical variables and parameters. In the complex realm of online searching, where researchers are always seeking the route to the best search strategies and the most powerful query terms and sequences, Markov process analysis…

Item response theory (IRT) is based on the assumption that a direct relationship exists between an examinee's total performance on a set of items and the difficulty of each item on the test. The Rasch model represents this relationship mathematically on an equal interval scale. This paper argues that IRT, under the required conditions, provides…

A Bayesian approach for finding latent classes in data is discussed. The approach uses finite mixture models to describe the underlying structure in the data and demonstrate that the possibility of using full joint probability models raises interesting new prospects for exploratory data analysis. The concepts and methods discussed are illustrated…

The National Household Education Survey (NHES) is a data collection system of the National Center for Education Statistics. The NHES is a telephone survey of the noninstitutionalized civilian population using households selected using random digit dialing methods. Approximately 60,000 households are screened for each administration, and people who…

The present investigation employed Kahneman and Tversky's (1973) "Cab Problem" and the "Shuttle Problem" (a modified version of the former) in two separate experiments to further examine the impact of several variables on the utilization of base-rate information, and to what extent gender is related to the utilization of…

With the Seeing and Thinking Mathematically materials, students learn mathematics by doing mathematics, by using and connecting mathematical ideas, and by actively constructing their own understandings. In this unit students learn to see probability through a mathematical lens by exploring and creating games and simulations and by applying the…

Two colleges of the University of Alabama have established the Alabama Quantitative Literacy (AQL) Workshop in an effort to prepare teachers to teach statistical techniques accurately and effectively and to enhance the ability of teachers to create new activity-based lessons. The AQL Workshop aims to achieve goals of the National Council of…