Under item response theory, the characteristic curve methods (Haebara and Stocking-Lord methods) are used to link two ability scales from separate calibrations. The linking methods use their respective criterion functions that can be defined differently according to the symmetry- and distribution-related schemes. The symmetry-related scheme…

Conventional wisdom claims a newly discovered dropout crisis in high schools. Jay Greene, of the Manhattan Institute, and Christopher Swanson, formerly with the Urban Institute, are primarily responsible for this claim, publishing reports showing these extraordinary high dropout rates nationwide, for the states, and for many specific school…

Youth with disabilities are disproportionately represented in the child welfare system (Crosse, Kaye, & Ratnofsky, 1992; Sullivan & Knutson, 2000). Although research on this topic is limited, youth with disabilities who are emancipating from foster care are at risk for particularly poor outcomes, experiencing even lower rates of employment,…

Professional development that improves teaching and student learning meets research-based standards to ensure high-quality educator learning experiences. Since the quality of professional learning affects its results, many states, districts, and schools want to measure the effectiveness of their professional development to make targeted…

Providing remedial (also known as developmental) education is the primary way colleges cope with students who do not have the academic preparation needed to succeed in college-level courses. Remediation is widespread, with nearly one-third of entering freshman taking remedial courses at a cost of at least $1 billion per year. Despite its…

This is the fourth annual report on the effects of the introduction of variable fees arrangements for UK and EU-domiciled full-time undergraduates attending higher education institutions in England. This report, like its predecessors, brings together a range of information from publicly accessible sources and the institutions themselves about the…

Statistical data can contribute to library cooperation by documenting the need for cooperation, identifying the direction cooperation should take, and evaluating its effectiveness and impact. (Author/PF)

Describes how reference librarians can help patrons use machine-readable data files. (PF)

This article describes the statistical procedure for calculating weight-adjusted oxygen uptake scores for use in correlational analysis. (Author)

Three linear equating methods for the common item non-equivalent populations design, a design often used in practice, are compared by an analytical method. The models include: (1) Tucker's equally reliable method; (2) Levine's equally reliable methods; and (3) the congeneric method recently introduced by Woodrull (1986). Tucker's method makes…

A sampling theorem, based on the binomial probability distribution but otherwise distribution-free, is derived and some of its applications are illustrated numerically. (Author)

THE 1ST YEAR OF A 5- TO 6-YEAR PROJECT TO REPLICATE A BOSTON STUDY OF JUVENILE DELINQUENCY IN PUERTO RICO WAS REPORTED. THIS FINAL REPORT COVERS ONLY THE PILOT PHASE OF THE PROJECT. THE PROBLEM ON WHICH THE RESEARCH IS FOCUSED IS TO DETERMINE WHICH OF THE FINDINGS OF "UNRAVELING JUVENILE DELINQUENCY," AS THE STARTING POINT FOR THE PUERTO…

The question of whether or not block size has an effect on the statistical analysis of data is examined through a study involving a total of 10,000 simulated experiments. Results indicate that the inflation in Type 1 error rate is much higher than is reported in the literature when using CE as the independent variable. There is little or no…

Statistical information on the care of the mentally handicapped in Maryland is presented. Tables contain the following data on hospital (resident) facilities for the mentally handicapped: maximum and average occupancy rates, number of hospitalized patients, total number of patients under care, number of patients on hospital books, net releases,…