Structuring UFO Reports: Vallee's Classification Codes, Interaction Matrix, and SVP Credibility Ratings

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Jacques Vallee's framework classifies UFO events with a Classification Code that covers four behavior categories (Anomaly, Fly-by, Maneuver, Close Encounter) and five interaction levels, and pairs this with a three-digit SVP credibility rating (Source reliability, Site visit, Probability of natural explanation), separating description from credibility so anomalies—including psychic effects or transformations—can be described and evaluated without discarding them.

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What Is Jacques Vallees UFO Classification Methodology? - New Space Economy

In the often-chaotic field of ufology, organizing data is as challenging as gathering it. Phenomena range from distant nocturnal lights to significant psychological experiences and, disturbingly, physical injuries. In his seminal work Confrontations: A Scientists Search for Alien Contact, Dr. Jacques Vallee addresses the limitations of earlier classification systems, such as J. Allen Hynek’s original Close Encounter framework, which often failed to capture the high strangeness or aggressive nature of certain reports.