| Indicator | University Z-score | Average country Z-score |
|---|---|---|
|
Multi-affiliation
|
1.035 | -0.068 |
|
Retracted Output
|
-0.287 | -0.191 |
|
Institutional Self-Citation
|
0.537 | 1.380 |
|
Discontinued Journals Output
|
-0.097 | 0.691 |
|
Hyperauthored Output
|
2.553 | 0.149 |
|
Leadership Impact Gap
|
2.726 | 0.831 |
|
Hyperprolific Authors
|
0.039 | -0.770 |
|
Institutional Journal Output
|
-0.268 | 1.113 |
|
Redundant Output
|
-0.110 | 0.832 |
Sofia University's overall integrity profile (Z-score: 0.260) reflects a solid foundation with clear areas of excellence, alongside specific vulnerabilities that require strategic attention. The institution demonstrates robust control over publication quality, evidenced by low-risk indicators for retracted output, publication in discontinued journals, and redundant output. A standout strength is the minimal reliance on institutional journals, which insulates the university from risks of academic endogamy prevalent at the national level. However, significant risks are concentrated in authorship and collaboration practices, particularly in hyper-authored output, and medium-risk signals appear in multiple affiliations, hyperprolific authorship, and a notable dependency on external partners for research impact. These challenges contrast with the university's dominant position in the national academic landscape, where SCImago Institutions Rankings data confirms its leadership in key areas such as Arts and Humanities, Computer Science, Physics and Astronomy, and Social Sciences. The identified risks, especially those related to authorship integrity and impact dependency, directly challenge the university's mission to be an "exemplary" research center with a "high international reputation" and the "nucleus of the Bulgarian scientific and cultural elite." To fully align its practices with its mission, it is recommended that the university undertakes a focused review of its authorship and collaboration policies, ensuring its impressive thematic strengths are built upon a foundation of transparent and sustainable scientific integrity.
The institution's Z-score for this indicator is 1.035, showing a moderate deviation from the national average of -0.068. This suggests that the university exhibits a greater sensitivity to factors that encourage multiple affiliations than its national peers. While multiple affiliations are often a legitimate result of researcher mobility or partnerships, this divergence from the national standard warrants a review. It is important to ensure these practices are a product of genuine collaboration and not strategic attempts to inflate institutional credit or engage in “affiliation shopping,” which could distort the university's perceived contribution to the scientific landscape.
With a Z-score of -0.287, the institution displays a prudent profile that is even more rigorous than the national standard (-0.191). This performance indicates that the university's quality control mechanisms and supervisory processes prior to publication are highly effective. Retractions are complex events, and this very low rate suggests a strong institutional culture of integrity and methodological rigor, where potential errors are identified and corrected responsibly before they enter the scientific record, thereby safeguarding its academic reputation.
Sofia University demonstrates differentiated management of a risk that is common in the country. Its Z-score of 0.537 is significantly lower than the national average of 1.380, indicating that the institution successfully moderates the tendency toward institutional self-citation. While a certain level is natural, the university's controlled rate helps it avoid the appearance of scientific isolation or 'echo chambers.' This practice ensures its research is validated by the broader external community, mitigating the risk of endogamous impact inflation and strengthening the credibility of its academic influence.
The institution shows strong resilience against a risk that is more prevalent at the national level. With a Z-score of -0.097 compared to the country's medium-risk score of 0.691, the university’s control mechanisms appear to act as an effective filter. This demonstrates a high level of due diligence in selecting dissemination channels, protecting the institution from the severe reputational damage associated with 'predatory' or low-quality publishing practices and ensuring that research resources are channeled toward impactful and ethically sound venues.
The university's rate of hyper-authored output (Z-score: 2.553) presents a significant alert, markedly accentuating a vulnerability that is only moderately present in the national system (Z-score: 0.149). This high value suggests the institution is amplifying a national trend. While extensive author lists are legitimate in 'Big Science,' a high rate outside these contexts can indicate systemic author list inflation, which dilutes individual accountability and transparency. This signal is critical and requires an urgent review to distinguish between necessary massive collaborations and potential 'honorary' authorship practices that could compromise research integrity.
The institution exhibits high exposure to dependency on external collaborations for its scientific impact, with a Z-score of 2.726 that is substantially higher than the national average of 0.831. This indicates the university is more prone to this alert signal than its peers. Such a wide positive gap, where overall impact is high but the impact of institution-led research is comparatively low, signals a potential sustainability risk. It suggests that the university's scientific prestige may be more exogenous than structural, prompting a strategic reflection on whether its excellence metrics stem from genuine internal capacity or from a supporting role in collaborations where it does not exercise intellectual leadership.
The university displays a moderate deviation from the national norm regarding hyperprolific authors. Its Z-score of 0.039 contrasts with the country's low-risk average of -0.770, indicating a greater sensitivity to this risk factor within the institution. While high productivity can evidence leadership, extreme individual publication volumes can challenge the limits of meaningful intellectual contribution. This signal warrants a review to ensure a healthy balance between quantity and quality, and to guard against risks such as coercive authorship or the assignment of authorship without real participation, which prioritize metrics over the integrity of the scientific record.
The institution demonstrates a clear case of preventive isolation from national trends in this area. With a very low Z-score of -0.268, it does not replicate the medium-risk dynamics observed across the country (Z-score: 1.113). This indicates a strong commitment to external validation and global visibility, successfully avoiding the risks of academic endogamy and potential conflicts of interest that can arise from over-reliance on in-house journals. The university's practices ensure its research undergoes independent external peer review, strengthening its scientific credibility and global standing.
Sofia University shows institutional resilience in managing redundant output. Its low Z-score of -0.110 stands in contrast to the medium-risk national average of 0.832, suggesting its control mechanisms effectively mitigate a systemic risk. This indicates that the university fosters a culture that prioritizes significant new knowledge over artificially inflating productivity. By discouraging the practice of dividing a coherent study into 'minimal publishable units,' the institution protects the integrity of the scientific evidence base and avoids overburdening the peer-review system.
