A major problem facing educators in the United States is how to determine when the nation's five million English language learners (ELL) are ready to exit language-learning programs, i.e. to be "reclassified" as fluent English proficient (R-FEP) and placed in mainstream classrooms without additional language support. No Child Left Behind…

This report describes the implementation and intermediate impacts of an intervention designed to provide incentives to induce a school district's highest-performing teachers to work in its lowest-achieving schools to improve student achievement. The report is part of a larger study that used random assignment to form equivalent groups of…

This paper considers the influence of labor demand for new PhD recipients on time to the doctorate. I use student-level data on all doctorates awarded by U.S. universities in seven humanities and social science fields together with the annual number of job listings by field from 1975 to 2005. An increase in the number of job listings in a field…

Judicial sanctions are used by drug courts to encourage clients to comply with program requirements. However, few studies have explored the application of sanctions in drug courts or the relationship between sanctions and drug court graduation. This article reports the results of a study of sanctions as applied in a drug court in southwest…

Objective: Childhood abuse has been linked to negative sequelae for women later in life including drug and alcohol use and violence as victim or perpetrator and may also affect the development of women's social networks. Childhood abuse is prevalent among at-risk populations of women (such as the homeless) and thus may have a stronger impact on…

Objective: This study uses data from the largest effectiveness trial to date on treatment of co-occurring posttraumatic stress and substance use disorders, using advances in statistical methodology for modeling treatment attendance and membership turnover in rolling groups. Method: Women receiving outpatient substance abuse treatment (N = 353)…

Using detailed individual-level data from public universities in the state of Ohio, I estimate the effect of various institutional expenditures on the probability of graduating from college. Using a competing risks regression framework, I find differential impacts of expenditure categories across student characteristics. I estimate that student…

In a simulated casino environment, 6 nonpathological women played concurrently available commercial slot machines programmed to pay out at different rates. Participants did not always demonstrate preferences for the higher paying machine. The data suggest that factors other than programmed or obtained rate of reinforcement may control gambling…

The relationship between nonword repetition ability and vocabulary size and vocabulary learning has been a topic of intense research interest and investigation over the last two decades, following the demonstration that nonword repetition accuracy is predictive of vocabulary size (Gathercole & Baddeley, 1989). However, the nature of this…

Numeracy--that is, how facile people are with mathematical concepts and their applications--is gaining importance in medical decision making and risk communication. This article proposes six critical functions of health numeracy. These functions are integrated into a theoretical framework on health numeracy that has implications for risk…

Subjective expected relative similarity (SERS) is a descriptive theory that explains cooperation levels in single-step prisoner's dilemma (PD) games. SERS predicts that individuals cooperate whenever their "subjectively perceived similarity" with their opponent exceeds a situational index, namely the game's "similarity threshold." A thought…

Two diverging hypotheses concerning the influence of surprising events on hindsight effects have been proposed: Although some authors believe that surprising events lead to a reversal of hindsight bias, others have proposed that surprise increases hindsight bias. Drawing on the separate-components view of the hindsight bias (which argues that…

The Statistics Online Computational Resource (http://www.SOCR.ucla.edu) provides one of the largest collections of free Internet-based resources for probability and statistics education. SOCR develops, validates and disseminates two core types of materials--instructional resources and computational libraries. (Contains 2 figures.)

Numerous recent studies suggest that human learners, including both infants and adults, readily track sequential statistics computed between adjacent elements. One such statistic, transitional probability, is typically calculated as the likelihood that one element predicts another. However, little is known about whether listeners are sensitive to…

The present study explored the delay discounting of future and past monetary rewards by pathological gamblers. Using a multiple baseline design, following repeated exposure to choices between smaller immediate and larger delayed consequences, participants completed a relational responding task that attempted to alter the psychological functions of…