Craig S. Wells

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BACKGROUND Validity evidence based on the internal structure of an assessment is one of the five forms of validity evidence stipulated in the Standards for Educational and Psychological Testing of the American Educational Research Association, American Psychological Association, and National Council on Measurement in Education. In this paper, we describe(More)
Along with the increasing popularity of item response theory (IRT) in testing practices, it is important to check a fundamental assumption of most of the popular IRT models, which is unidimensionality. Nevertheless, it is hard for educational and psychological tests to be strictly unidimensional. The tests studied in this paper are from a standardized(More)
One way that policies get enacted in higher education is through educational research. In 2000 the National Association of Graduate-Professional Students conducted the National Doctoral Program Survey (NDPS) in an effort to learn more about doctoral students’ experiences and to influence doctoral education policy at both the local and national level.(More)
Calculator Accommodation 2 2 Abstract In a statewide achievement test, the use of a calculator is often allowed as an accommodation for students with disabilities (SWD). The purpose of the accommodation is to eliminate the disadvantage faced by SWDs relative to peers without disabilities with the same level of overall mathematics proficiency. However, it is(More)
BACKGROUND About 80% of women experience premenstrual symptoms (PMSx), and about 50% of women seek medical care for them, posing a large medical care burden. However, despite women's use of anti-inflammatory agents for relief from these symptoms, and the fact that anti-inflammatory agents provide relief from some PMSx, the relationship of inflammation to(More)
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