DETECT is a nonparametric procedure based on conditional covariances for dimensionality assessment. It can be used to assess the strength of multidimensionality in a test, to estimate the number of dimensions, and to partition items into distinct clusters that represent dimensions underlying the test. DETECT works well with test data that display simple or approximate simple structure in simula...

Background: The Copenhagen Burnout Inventory (CBI) is a public domain questionnaire measuring the degree of psychological fatigue experienced in three subdimensions of Burnout: personal (PB), work-related (WB), and client-related Burnout (CB). The study aimed to examine the acceptability, reliability and construct validity of the Spanish version of CBI. Method: The study population consisted of...

Step 1 of the United States Medical Licensing Examination has now replaced the National Board of Medical Examiners part 1 examination as the initial step in medical licensure. The new examination format places an increased emphasis on clinical vignettes to test basic physiological concepts. Suggestions from a question-writing workshop were incorporated into cardiovascular items in a midcourse p...

AIMS This paper explored, in a population-based sample of males, the factorial structure of criteria for substance abuse and dependence, and compared qualitatively the performance of these criteria across drug categories using item-response theory (IRT). DESIGN Marginal maximum likelihood was used to explore the factor structure of criteria within drug classes, and a two-parameter IRT model w...

Current models of attention, typically claim that vision and audition are limited by a common attentional resource which means that visual performance should be adversely affected by a concurrent auditory task and vice versa. Here, we test this implication by measuring auditory (pitch) and visual (contrast) thresholds in conjunction with cross-modal secondary tasks and find that no such interfe...

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Purpose: To develop an instrument (DSCKQ-30) for measuring type 2 diabetic patients’ knowledge of self-care practices. Methods: A 30-item questionnaire (DSCKQ-30) consisting of close ended questions was developed for this study. DSCKQ-30 was self administered to a cross-section of randomly selected 400 ambulatory adult diabetic patients (≥ 18 years), who were attending endocrinology clinics at ...

PURPOSE The purpose of this study was to improve the quality of items on the Korean Nursing Licensing Examination by developing and evaluating case-based items that reflect integrated nursing knowledge. METHODS We conducted a cross-sectional observational study to develop new case-based items. The methods for developing test items included expert workshops, brainstorming, and verification of ...