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Bronson Fitzpatrick R 《Medical reference services quarterly》2004,23(4):49-59
This column features an overview of the Division of Specialized Information Services, National Library of Medicine Household Products Database. Basic searching techniques are presented, as well as a brief overview of the data contained in this file. The Household Products Database contains information on chemical ingredients in various products used in U.S. homes. 相似文献
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This study investigated possible explanations for an observed change in Rasch item parameters (b values) obtained from consecutive administrations of a professional licensure examination. Considered in this investigation were variables related to item position, item type, item content, and elapsed time between administrations of the item. An analysis of covariance methodology was used to assess the relations between these variables and change in item b values, with the elapsed time index serving to control for differences that could be attributed to average or pool changes in b values over time. A series of analysis of covariance models were fitted to the data in an attempt to identify item characteristics that were significantly related to the change in b values after the time elapsed between item administrations had been controlled. The findings indicated that the change in item b values was not related either to item position or to item type. A small, positive relationship between this change and elapsed time indicated that the pool b values were increasing over time. A test of simple effects suggested the presence of greater change for one of the content categories analyzed. These findings are interpreted, and suggestions for future research are provided. 相似文献
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Fitzpatrick RB 《Medical reference services quarterly》2007,26(3):75-83
The "Online Updates" column generally focuses on bibliographic databases that may be licensed from commercial vendors or are available free of charge from a federal government agency. HazLit is featured because it is a unique and comprehensive resource of the literature of natural disasters. This column provides background information on HazLit and offers some searching basics, as well as highlights special information found at the Web site that hosts the database. 相似文献
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Collier Daniel A. Fitzpatrick Dan Dell Madison Snideman Samuel S. Marsicano Christopher R. Kelchen Robert Wells Kevin E. 《Research in higher education》2022,63(5):741-767
Research in Higher Education - Postsecondary institutions’ responses to COVID-19 are a topic of immediate relevance. Emergent research suggests that partisanship was more strongly linked to... 相似文献
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Roberta Bronson Fitzpatrick 《Medical reference services quarterly》2013,32(1):56-64
TIMELIT is a database covering the topic of medical education. Entries in this resource cover a range of topics from professional education to both health and patient education. This column will provide an overview of the database and its content, as well as give basic information about searching TIMELIT. 相似文献
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Roberta Bronson Fitzpatrick 《Medical reference services quarterly》2013,32(3):303-311
ABSTRACT The Carcinogenic Potency Database reports analyses of animal cancer tests on 1,547 chemicals. These tests are used in support of cancer risk assessments for humans. Results are searchable and are made available via the National Library of Medicine's (NLM) TOXNET system. This column will provide background information on the database, as well as present search basics. 相似文献