Page 268 - JOURNAL OF LIBRARY SCIENCE IN CHINA 2015 Vol. 41

Extended English abstracts of articles published in the Chinese Edition of Journal of Library Science in China 2015 Vol.41 267

psychological attribution of acceptant behavior originates. And the platform services may adjust
the personal cognition during the use of the accepted platform service.
This qualitative research based on grounded theory identifies variable categories, such as the
promotion of the platform, community committee service quality, platform value perception, which
are rarely mentioned in previous researches through a more comprehensive analysis, explores the
mechanism of interaction between the environmental factors and users’ personal cognition and
behaviors, further verifies the social cognitive theory and applies this theory in the research on the
use of platform.

Pt indices: Evaluating researchers under the context of time
1 ∗
Yi HAN & Hui XIA

This paper, taking account of the time factor, intends to reconstruct P-index, a new scientific
and technological evaluation index which could overcome such problems of h-index as lack
of discrimination, mere focus on core elements and complex operations yet still encountering
difficulty, due to its neglect of the time effect, in reducing evaluation errors under the context of
evaluating literature with the same citation amounts but different citation time window or slow-
aging literature. Time, a historical selective factor, is taken as a regulating factor to improve P-index
owing to its certain selectively filtering function upon the researchers’ scientific products and
the corresponding general classification of the quality levels of researchers’ scientific products.
For the researcher’s scientific products with different publication age, the publication age at
the evaluation point is the dilution factor to its quality factor, namely citation number, which is
referred to as dilution effects of the time factor. Consequently, Pt 1 index, with the publication age
as a regulating factor, is constructed to evaluate the scientific performance of the researchers and
to eliminate the cumulative effect of the time factor. For the researcher’s products collection, the
citation distribution characteristics of different documents reflect their contribution differences
to researcher’s prestige, and the time for the long-time cited literatures is an agglomerative factor
to the citation numbers, which is called agglomerative effect of time factor. Pt 2 index is thus
constructed, with the half life of one discipline as the boundary line to weigh the quality factor
of cited literature out of the half life, to evaluate the researcher’s performance and highlight the
contribution rate of high-quality literature.
In this research, the top 100 scholars of Library and Information Science in China are sorted
by h-index as a sample and the data about citing and cited literature are retrieved in the database
of Chinese Social Sciences Citation Index (CSSCI) from 1998 to 2013. The half-life of about the
sample discipline is calculated, based on the Burton-Kebler equation, as about 4 years, and the

* Correspondence should be addressed to Yi HAN, Email: Hanyi72@swu.edu.cn, ORCID: 0000-0001-7021-3229