Methodology
The Press Credibility Index (PCI)
Our credibility score — displayed on every article — summarizes in a number from 0 to 100 the estimated reliability of the information. Here is how it is calculated.
The four criteria
Source reliability
Each source has a trust score calculated from its publication history, past corrections, business model and reputation in the international media landscape.
Fact cross-checking
Our models analyze whether article claims are corroborated by other independent sources. A fact reported by a single unverifiable source penalizes the score.
Bias and editorial balance
We detect strong linguistic bias, lack of counterpoint or use of sensationalist headlines. A balanced, factual article receives a better score.
Recency and context
Recent and contextualized information is valued. Articles that lack context or rely on outdated data see their score decrease.
Credibility levels
Reliable source, cross-checked facts, balanced article.
Generally reliable source, some unverified points.
Source to monitor, insufficient cross-checking.
Unknown source or article not cross-checkable.
Limits and transparency
The PCI is an indicator, not a verdict. AI can make mistakes, reliable sources can publish errors, and little-known sources can publish truths. We encourage you to consult original sources and exercise critical thinking.
Our model is continuously improving. If you believe a score is incorrect, contact us.