A Study of author self-citation and journal self-citationn environmental engineering
Date Issued
2009
Date
2009
Author(s)
Lin, Wen-Yau Cathy
Abstract
The objective of this study is to identify the author/journal self-citation pattern by citation analysis and context analysis on the environmental engineering key journals which were published in between year 1999 to 2008. For the level of journal comparison, journal self-citation rate, impact factor, immediacy index, and journal h-index were analyzed under the conditions of containing as well as eliminating the self-cited data. On the other hand, the correlation between author self-citation and number of co-authors, age of reference article, location of reference in original articles, and author h-index were examined in the aspect of author difference.esults suggested that moderate significant correlation existed between the journal frequency self-citing and frequency self-cited rates. Those journals with higher self-citing rate tended to be more productive. The journal self-citation rate had no significant correlation with both impact factor and immediacy index. Under the conditions of containing or eliminating journal self-cited data, a high significant correlation between impact factor and 5-Year impact factor was identified but with a significant difference in the value. Analysis on longer period of h-indices showed similar pattern as on the analysis of impact factor. With shorter citation window of h-indices, self-citation rate and h- values were observed to be moderately correlated in some years.n the aspect of author difference, the self-cited rate of multi-authored articles was higher than single-authored ones. The correlation coefficient between the number of authors and author self-citation rate was law. Self-citing references were found to be more recent than those citations to others. Authors tended to cite their own previous published works in the introduction, result, and method sections. In the sections of method, result, and conclusion, self-citing references are more common than citing to others. No matter containing the self-cited data or not, insignificant effect was found on the author h-values and h-index. However, the correlation coefficients were strong between the author h-value and both their productivity and the number of total cited times.ased upon the results, suggestions were made as follows. When evaluating the environment technology related journal publication, using 2-Year impact factor and 2-Year h-index instead of longer period ones would be adequate in the citation window setting. Impact factor, immediacy index, and journal/author h-indices seemed all robust enough against self-citation. Thus, it is not necessary to eliminate the self-cited data when doing environmental technology related journal or author evaluation. The journal productivity should be taken into account when measuring journal self-citation rates. For surveying the self-citing rationality, each article’s introduction section could be a priority target.
Subjects
author self-citation
journal self-citation
impact factor
immediacy index
h-index
Type
thesis
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