How to analyze publication time trends by correspondence factor analysis:: Analysis of publications by 48 countries in 18 disciplines over 12 years

被引:13
作者
Doré, JC [1 ]
Ojasoo, T [1 ]
机构
[1] Museum Natl Hist Nat, CNRS, URA 401, F-75231 Paris, France
来源
JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE AND TECHNOLOGY | 2001年 / 52卷 / 09期
关键词
D O I
10.1002/asi.1130.abs
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
This study is a follow-up to a published Correspondence Factorial Analysis (CFA) of a dataset of over 6 million bibliometric entries (Dore et al, JASIS, 47(8), 588-602,1996), which compared the publication output patterns of 48 countries in 18 disciplines over a 12-year period (1981-1992). It analyzes by methods suitable for investigating short time series how these output patterns evolved over the 12-year span. Three types of approach are described: (1) the chi(2) distances of the publication output patterns from the center of gravity of the multidimensional system-which represents an average world pattern-were calculated for each country and for each year. We noted whether the patterns moved toward or away from the center with time; (2) individual annual output patterns were introduced-as supplementary variables into an existing global overview covering the whole time-span [CFA map of (countries x disciplines)]. We observed how these patterns moved about within the map year by year; (3) the matrix (disciplines x time) was analyzed by CFA to derive time trends for each country. CFA revealed the "inner clocks" governing publication trends. The time scale that best fitted the data was not a linear but an elastic scale. Although different countries laid emphasis on publication in different disciplines, the overall tendency was toward greater uniformity in publication patterns with time.
引用
收藏
页码:763 / 769
页数:7
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