图书馆学实验方法研究     

C·H·布沙  侯汉清  黄刚 《大学图书馆学报》1984,(2):58-65

<正> 一、基本概念"实验"可以定义为研究者对起重要作用的条件加以精确地说明和控制的一种研究方式.改变一个或多个自变量的值,观察这种变化对于一个或多个实验组的各个因变量值的影响.而其它可能与研究课题有关的(即影响因变量的值)因素,则通过精密的实验将其限制在最小程度.这样,通过控制实验的条件,研究假设的基本要求就得到满足.在图书馆学方面,实验方法可以用于鉴定那些有关图书馆藏书建设,藏书保管和藏书利用等方面的新技术,说明那些定义不准  相似文献   

The medical history of Menilek II, Emperor of Ethiopia (1844-1913): a case of medical diplomacy     

Rosenfeld CP 《Munger Africana Library notes》1978,(45-46):3-43

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President's Page     

Sargent C 《Bulletin of the Medical Library Association》1981,69(4):400-401

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1977 annual meeting in Seattle     

Stock CJ 《Bulletin of the Medical Library Association》1977,65(1):53-57

You are invited to Seattle for the 1977 Annual Meeting, its theme to be "Change, Comparison, and Controversy." Suggestions are made for activities in Seattle and the Pacific Northwest, including the cohost city, Vancouver, British Columbia.  相似文献   

Indexing consistency in MEDLINE   总被引：3，自引：0，他引：3  

M E Funk  C A Reid 《Bulletin of the Medical Library Association》1983,71(2):176-183

The quality of indexing of periodicals in a bibliographic data base cannot be measured directly, as there is no one "correct" way to index an item. However, consistency can be used to measure the reliability of indexing. To measure consistency in MEDLINE, 760 twice-indexed articles from 42 periodical issues were identified in the data base, and their indexing compared. Consistency, expressed as a percentage, was measured using Hooper's equation. Overall, checktags had the highest consistency. Medical Subject Headings (MeSH) and subheadings were applied more consistently to central concepts than to peripheral points. When subheadings were added to a main heading, consistency was lowered. "Floating" subheadings were more consistent than were attached subheadings. Indexing consistency was not affected by journal indexing priority, language, or length of the article. Terms from MeSH Tree Structure categories A, B, and D appeared more often than expected in the high-consistency articles; whereas terms from categories E, F, H, and N appeared more often than expected in the low-consistency articles. MEDLINE, with its excellent controlled vocabulary, exemplary quality control, and highly trained indexers, probably represents the state of the art in manually indexed data bases.  相似文献   

Book reviews     

Wert LM  Etter SC  Chitty ME 《Medical reference services quarterly》1983,2(3):97-102

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Academic achievement following childhood brain disease: implications for the concept of learning disabilities.     

H G Taylor  C Schatschneider 《Journal of learning disabilities》1992,25(10):630-638

The present study examined three hypotheses regarding the consequences of early brain damage for academic achievement: First, early brain insults will have a negative impact on achievement, even in children with normal intelligence. Second, underachievement in these children will be at least partially independent of IQ (i.e., not fully accounted for by a lowering of IQ within the average range). Third, normally intelligent children with histories of brain insult will also manifest selective cognitive dysfunctions. To test these hypotheses, we compared two groups of children who had recovered from Haemophilus influenzae type b meningitis. The "complicated" group consisted of children who, as a consequence of having sustained neurologic complications during their illness, were more likely to have had brain insults. Children in the "uncomplicated" group did not have complications with their illness and were regarded as having escaped significant central nervous system (CNS) pathology. Only children with normal hearing and a prorated Full Scale IQ of at least 80 (WISC-R) were considered. Group differences on the Wide Range Achievement Test-Revised were consistent with the first two hypotheses. Although the two groups had similar Verbal IQs, the complicated group also had a lower mean Performance IQ and performed less well on perceptually demanding neuropsychological tasks. Findings suggest that learning disabilities may have selective, brain-related cognitive antecedents; but they challenge the practice of using IQ criteria for clinical diagnosis.  相似文献   

Myles Blomefylde, Elizabethan physician, alchemist and book collector: a sketch of a life     

Baker DC  Murphy JL 《The Bodleian Library record》1982,11(1):35-46

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Mental models: ways of looking at a system     

Borgman CL 《Bulletin of the American Society for Information Science / ASIS》1982,9(2):38-39

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President's Page     

Sargent CW 《Bulletin of the Medical Library Association》1982,70(1):59-60

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