Page 18 - The lraternational Journal of the Royal Society of Thailand.indd

The International Journal of the Royal Society of Thailand
Volume XV-2023

Authorship profiles of researchers affiliated with Thai organizations
Based on the snowball sampling, a total of 120 researchers, affiliated with Thai

organizations from Circles 1 to 4 of IR_01, were included in subsequent principal
component analysis. The first two PCA dimensions explained a total of 58.8% of the
total variation among the included researchers (Figures 3 & S1).

The primary driver of the first PCA dimension was the maximum and average
number of publications in the past 5 years, followed by the number of research

communities and the proportions of co-authors with affiliations in Western Asia and
Thailand, respectively (Figures 3A & S1). Notably, the proportion of co-authors
with Thai affiliations exhibited a negative correlation with the other drivers of PCA

Dimension 1 (Figures 3A & S2). At the same time, the second PCA Dimension
primarily differentiated the authorship profiles of the included researchers based on
the time since their first publication (academic experience), followed by the diversity
of research domains and the proportions of co-authors with affiliations in Western Asia
and Southern Asia, respectively. (Figures 3A & S1). While the clustering coefficient

exhibited a negative correlation with both the maximum and average annual publication
numbers, as well as the number of research communities (Figures 3A & S2).

The projections of individual researchers onto the first two PCA dimensions
revealed that the majority of included researchers aligned from the upper-left quadrant
(representing junior researchers with a small number of published articles) to the

lower-right quadrant (indicating Senior Researchers (SRs) with a larger number of
articles) on the individual PCA plane (Figure 3B). The authorship profile of Index
Researchers IR_01 and IR_02 was notably distinct from that of most included

researchers, as indicated by their highest coordinates in both dimensions, placing them
in the upper-right quadrant (Figure 3B). This quadrant represents junior researchers
with many published articles, and we will refer to them hereafter as High-performance
Junior Researchers (HJRs). The detailed authorship profiles of three selected High-
performance Junior Researchers (HJR_01, HJR_02, and HJR_03) and three Senior

Researchers (SR_01, SR_02, SR_03) are shown in Figures S3 and S4, respectively.

A Potential Use of Ego-centric Co-authorship Network Analysis for
10 Inspecting Research Misconduct: A Case Study of Thai Researchers