A fundamental measure underpinning the ranking is the D-index (Discipline H-index), which quantifies a researcher’s impact within a specific field by considering only papers and citation metrics relevant to the examined discipline—in this case, Neuroscience. This approach ensures that the ranking reflects disciplinary expertise rather than general academic output.
Scope of Research and Eligibility Criteria
In total, 279,971 scientist profiles spanning all disciplines were examined from a diverse array of bibliometric data sources. Within the domain of Neuroscience specifically, 20 scientists were identified and considered for this ranking.
To qualify for inclusion, a scientist’s D-index had to meet or exceed a threshold of 30, with the majority of tier publications demonstrably within the field of Neuroscience. Beyond bibliometric indicators, scientists’ awards and achievements relevant to Neuroscience were also taken into account, adding an additional layer of qualitative validation.
The D-index threshold for top researchers is dynamically set as an increment of 10 relative to the estimated total number of scholars in each discipline. This approach guarantees representation of the top 1% of leading scholars within Neuroscience. Moreover, candidates must exhibit a proximity of 30% or less between their general H-index and D-index, ensuring that their impact is significantly focused within the discipline.
Verification and Methodological Rigor
Recognizing the limitations of raw bibliometric data as an absolute evaluative tool, the Research.com team undertook meticulous manual verification of all scientist profiles. This verification involved cross-correlating author information against publications indexed in a wide range of established and trustworthy sources.
Although not directly influencing the final ranking position, the number of papers published in prominent journals and conference proceedings was considered an important secondary signal of a scientist’s substantive contribution to Neuroscience research.
Ultimately, the ranking positions were established using each researcher's D-index derived from data gathered through OpenAlex and CrossRef—widely regarded as the most prominent and reliable bibliometric databases available to the research community.
For a detailed explanation of the methodology involved, please visit our methodology page.
Research.com’s Mission Behind the Ranking
Research.com is committed to advancing global scientific progress by providing transparent, credible, and meticulously curated rankings that highlight leading experts across fields and geographies. Our mission with the creation of this ranking is to motivate researchers, companies, and policymakers worldwide to engage more effectively with the trajectories of top scholars. By doing so, we offer the scientific community an informed and accessible way to recognize who the foremost experts are in specialized areas such as Neuroscience, within Portugal, and beyond—including academic institutions and research organizations.
Through this, we strive to foster a collaborative ecosystem that values research excellence and encourages evidence-based decision-making in science policy and investment.
