A scientist’s position in the ranking is determined by their Discipline H-index, or D-index, which specifically reflects citation metrics and publication records strictly within the examined discipline of Psychology. This approach ensures that the ranking fairly and accurately represents impact and influence exclusively in the psychology research domain.
Scope of Research and Eligibility Criteria
In the process of compiling this ranking, a total of 279,971 scientist profiles from a variety of bibliometric databases across all disciplines were examined, including 1,000 scientists specializing specifically in Psychology within Thailand.
To qualify for inclusion, each scientist was required to have a D-index of at least 30, ensuring that only researchers with significant and sustained contributions to Psychology were considered. Additionally, a majority of their top-tier publications needed to be in the field of Psychology. Awards and notable achievements in the discipline were also evaluated as supplementary indicators of scholarly excellence.
The D-index threshold varies in increments of 10 depending on the estimated total number of active scholars in each discipline, a process that guarantees inclusion of the top 1% of leading experts within the field. To maintain methodological rigor, candidates were required to exhibit a proximity of 30% or less between their general H-index and their D-index, underscoring a focused and consistent research impact within Psychology.
Verification and Validation Practices
The Research.com team acknowledges that raw bibliometric data alone cannot serve as an absolute measure of a researcher’s scholarly output or impact. Therefore, every scientist profile included in the ranking was manually verified and cross-referenced against publications indexed in a broad range of trusted academic sources. This meticulous validation process reinforces the credibility and reliability of the ranking outcomes.
While the number of papers published in prestigious journals and conference proceedings does not directly influence a researcher’s rank, it serves as a valuable secondary signal of their contribution to advancing Psychology research.
Ultimately, a researcher’s position in the ranking is established using their D-index as calculated from data sourced primarily from OpenAlex and CrossRef, which are among the most comprehensive and widely recognized bibliometric databases available to the global research community.
For a detailed explanation of the methodology employed, please visit our methodology page.
Research.com’s Mission and Purpose
The overarching mission behind Research.com’s creation of this ranking is to motivate researchers, industry leaders, and policymakers worldwide to strategically assess the trajectories of leading experts in specific scientific fields. We aim to provide the global scientific community with an accessible and authoritative resource to identify and recognize top-tier scientists in various disciplines, countries, and academic institutions.
By delivering rigorously curated and transparently derived rankings, Research.com supports efforts to enhance collaboration, innovation, and knowledge dissemination across the international research ecosystem.
